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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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 Posted: Tue Aug 10, 2010 4:35 am Post subject: My new "Railgun" |
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Krisgage wrote:
It is Schneider-Kreuznach Symmar 240mm f/5.6 mounted on Sinar plate.
Setup. Nikon PB-3 bellow + extension tubes + lens mounted on Sinar plate.
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Krisgage
Joined: 16 Mar 2009
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Location: Singapore
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| Posted: Tue Aug 10, 2010 4:37 am Post subject: |
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Krisgage wrote:
Initial 2 test shots , bit boring stuff LOL
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mo
Joined: 27 Aug 2009
Posts: 8982
Location: Australia
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| Posted: Tue Aug 10, 2010 5:01 am Post subject: |
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mo wrote:
 You do mount this on a tripod?
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Moira, Moderator 
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
Last edited by mo on Tue Aug 10, 2010 7:59 am; edited 1 time in total |
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poilu
Joined: 26 Aug 2007
Posts: 10471
Location: Greece
Expire: 2019-08-29
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| Posted: Tue Aug 10, 2010 7:16 am Post subject: |
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poilu wrote:
nice experiment, quite a big slow 240mm!
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visualopsins
Joined: 05 Mar 2009
Posts: 10543
Location: California
Expire: 2025-04-11
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| Posted: Tue Aug 10, 2010 9:12 am Post subject: |
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visualopsins wrote:
The lens is 420mm. F12 is needed on large format for sufficient dof. The lens performs pretty good on crop dslr imho, similar to looking at actual pixels from sharpest APS-C lens.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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Minolfan
Joined: 30 Dec 2008
Posts: 3437
Location: Netherlands
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| Posted: Tue Aug 10, 2010 9:59 am Post subject: |
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Minolfan wrote:
What tells the green text in the front? Can you part the lens by taking off an element of the 240mm F5.6 lens to get a 420mm F12? |
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visualopsins
Joined: 05 Mar 2009
Posts: 10543
Location: California
Expire: 2025-04-11
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| Posted: Tue Aug 10, 2010 10:09 am Post subject: |
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visualopsins wrote:
Oh! I see the two focal lengths now. For different size LF media sizes, the 'crop-factor'?
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☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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GeorgeDexter
Joined: 07 Feb 2010
Posts: 12
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| Posted: Tue Aug 10, 2010 1:03 pm Post subject: Not crop factor |
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GeorgeDexter wrote:
| visualopsins wrote: |
| Oh! I see the two focal lengths now. For different size LF media sizes, the 'crop-factor'? |
A lens focal length remains the same no matter what format it is on. We talk about crop factors and 35mm equivalents, but to my knowledge no lens maker has ever engraved a "crop factor adjusted" focal length on a lens. This lens is a "convertible" -- it's focal length can be changed by adding or removing groups of elements. Kind of like having a large format lens that comes with it's own teleconverter. 
Last edited by GeorgeDexter on Tue Aug 10, 2010 6:17 pm; edited 1 time in total |
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visualopsins
Joined: 05 Mar 2009
Posts: 10543
Location: California
Expire: 2025-04-11
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| Posted: Tue Aug 10, 2010 1:20 pm Post subject: Re: Not crop factor |
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visualopsins wrote:
| GeorgeDexter wrote: |
| visualopsins wrote: |
| Oh! I see the two focal lengths now. For different size LF media sizes, the 'crop-factor'? |
A lens focal length remains the same no matter what format it is on. We talk about crop factors and 35mm equivalents, but to my knowledge no lens maker has ever engraved a "crop factor adjusted" focal length on a lens. This lens is a
-- it's focal length can be changed by adding or removing groups of elements. Kind of like having a large format lens that comes with it's own teleconverter. |
That makes more sense, thanks! No worries, I am well aware focal length does not change with media size; crop factor is useful only for comparing angle of view with different format cameras. Well, I have found one use for crop factor; that is for dof scale accuracy when using a lens for another format camera on crop-camera, multiply dof scale f/# by crop factor for setting lens aperture.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
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Minolfan
Joined: 30 Dec 2008
Posts: 3437
Location: Netherlands
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| Posted: Tue Aug 10, 2010 1:32 pm Post subject: |
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Minolfan wrote:
| Quote: |
| A lens focal length remains the same no matter what format it is on. We talk about crop factors and 35mm equivalents, but to my knowledge no lens maker has ever engraved a "crop factor adjusted" focal length on a lens. |
They sometimes do  ! Engraved around the lens of my Kodak Easyshare C360 (digital P&S): "34mm-102mm (Equiv) AF 3x Opticall". |
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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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| Posted: Tue Aug 10, 2010 4:54 pm Post subject: |
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Krisgage wrote:
Thanks guys for sharing the infos !
No mo, I hand held it.
I read somewhere, the 2 length engraved on the ring, like whats been mention, it is convertible by removing the rear group of the lens to achieve 420mm.
Actually, what is shown here is just a temporary holding. Now, I had removed the Sinar plate and mounted it the other way round. The name ring lens part mounted on the bellow and the rear lens part facing out. One funny thing I realised, changing the front and rear, the focusing point changed. For example, I mounted it like what the photo shown, the subject is sharp and in focus. I locked the bellow, removed the lens and put it the other way round, subject off focus ! Is it because of the different magnificant or something else causing it ?
By the way, the name ring lens part had a diameter of 67mm, thus it is mounted to the bellow securely via 67mm-62mm stepdown, 62-58mm stepdown, 58mm reverse ring to Nikon mount, Nikon mount extension tubes and finally to the bellow.
I will put up the photos soon. Now with everything mounted up, it looks like a Panzerfäuste !
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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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| Posted: Tue Aug 10, 2010 6:12 pm Post subject: |
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Krisgage wrote:
My another "railgun"
Schneider G-Claron 305mm f/9
This is one long long long lens ! almost 2 full sets of extension tubes at both ends of the bellow !
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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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| Posted: Tue Aug 10, 2010 6:15 pm Post subject: |
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Krisgage wrote:
The subjects had to be far far away or high high up !
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tkbslc
Joined: 02 Jul 2009
Posts: 194
Location: Utah, USA
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| Posted: Tue Aug 10, 2010 7:25 pm Post subject: |
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tkbslc wrote:
First thought: Hmm, that's interesting
Second thought: Why?
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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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| Posted: Tue Aug 10, 2010 7:39 pm Post subject: |
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Krisgage wrote:
| tkbslc wrote: |
First thought: Hmm, that's interesting
Second thought: Why?
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Doing and using something different to get a different perspective ? 
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Esox lucius
Joined: 26 Aug 2008
Posts: 2441
Location: Helsinki, Finland
Expire: 2011-11-18
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| Posted: Tue Aug 10, 2010 8:01 pm Post subject: |
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Esox lucius wrote:
Doing something different (especially if it's technology used) is I think the only thing keeping photography alive and developing, hence it is commendable in my opinion  |
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
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| Posted: Tue Aug 10, 2010 9:12 pm Post subject: |
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luisalegria wrote:
"Second thought: Why? "
Because its there !
- Sir E. Hillary
It looks like this monster is good for 8x10, and possibly 11x14
Get an old camera (or make one), and this should make amazing pictures.
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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mo
Joined: 27 Aug 2009
Posts: 8982
Location: Australia
Expire: 2016-07-30
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| Posted: Tue Aug 10, 2010 11:18 pm Post subject: |
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mo wrote:
Keep doing it because you can! However you may need longer arms if you keep going and multiple tripods... Can you take a photo of those objects with a normal camera/lens just for comparison?
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Moira, Moderator
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
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Krisgage
Joined: 16 Mar 2009
Posts: 681
Location: Singapore
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| Posted: Tue Aug 10, 2010 11:58 pm Post subject: |
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Krisgage wrote:
Thanks Esox lucius, I agreed with you.
Luis, you mean with a film back and ground glass setup that kind ?
Mo, ok sure. I think you want to see the distance or something ?
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Wed Aug 11, 2010 12:36 am Post subject: |
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luisalegria wrote:
Yes, a large format camera.
You have the really expensive part, lens and shutter.
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I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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mo
Joined: 27 Aug 2009
Posts: 8982
Location: Australia
Expire: 2016-07-30
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| Posted: Wed Aug 11, 2010 3:32 am Post subject: |
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mo wrote:
| Quote: |
| Mo, ok sure. I think you want to see the distance or something |
Yes, thank you
_________________
Moira, Moderator
Fuji XE-1,Pentax K-01,Panasonic G1,Panasonic G5,Pentax MX
Ricoh Singlex TLS,KR-5,KR-5Super,XR-10
Lenses
Auto Rikenon's 55/1.4, 1.8, 2.8... 50/1.7 Takumar 2/58 Preset Takumar 2.8/105 Auto Takumar 2.2/55, 3.5/35 Super Takumar 1.8/55...Macro Takumar F4/50... CZJ Biotar ALU M42 2/58 CZJ Tessar ALU M42 2.8/50
CZJ DDR Flektogon Zebra M42 2.8/35 CZJ Pancolar M42 2/50 CZJ Pancolar Exakta 2/50
Auto Mamiya/Sekor 1.8/55 ...Auto Mamiya/Sekor 2/50 Auto Mamiya/Sekor 2.8/50 Auto Mamiya/Sekor 200/3.5 Tamron SP500/8 Tamron SP350/5.6 Tamron SP90/2.5
Primoplan 1.9/58 Primagon 4.5/35 Telemegor 5.5/150 Angenieux 3.5/28 Angenieux 3,5/135 Y 2
Canon FL 58/1.2,Canon FL85/1.8,Canon FL 100/3.5,Canon SSC 2.8/100 ,Konica AR 100/2.8, Nikkor P 105/2.5
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tkbslc
Joined: 02 Jul 2009
Posts: 194
Location: Utah, USA
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| Posted: Wed Aug 11, 2010 8:38 pm Post subject: |
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tkbslc wrote:
| Krisgage wrote: |
| tkbslc wrote: |
First thought: Hmm, that's interesting
Second thought: Why?
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Doing and using something different to get a different perspective ? |
I like to tinker, too, but you have to admit this is not at all a practical solution by any definition. There are plenty of 200-300mm options designed for an SLR that would likely perform considerably better and not require a tripod and 2 foot long focusing extension.
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Canon 30D + some AF and MF lenses |
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luisalegria
Joined: 07 Mar 2008
Posts: 6627
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Wed Aug 11, 2010 11:26 pm Post subject: |
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luisalegria wrote:
Its an excellent way to evaluate center sharpness of a LF lens, and if you can arrange for a mount with sufficient movements, across the covered circle too.
_________________
I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
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Boomer Depp
Joined: 08 Oct 2009
Posts: 552
Location: Kingston,Washighton
Expire: 2011-12-04
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| Posted: Thu Aug 12, 2010 12:15 am Post subject: |
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Boomer Depp wrote:
I think it's way cool....I'll have to give this a go!....I've been using extension tubes with lenses over 300mm to get close ups of hummingbirds....for certain with small animals,reptiles and birds the bellows would give you a lot of options....Thank you Krisgage very much for the idea and the inspiration!
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Trust that little voice in your head that says "Wouldn't it be interesting if...." And then do it. |
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Big Dawg
Joined: 28 Jan 2009
Posts: 2530
Location: Thach Alabama
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| Posted: Thu Aug 12, 2010 3:50 pm Post subject: |
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Big Dawg wrote:
| Krisgage wrote: |
| tkbslc wrote: |
First thought: Hmm, that's interesting
Second thought: Why?
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Doing and using something different to get a different perspective ? |
Now that is an attitude I can agree with.
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Big Dawg |
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