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alex ph
Joined: 16 Mar 2013
Posts: 1674
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 Posted: Mon May 13, 2019 1:34 am Post subject: How do you adapt large projection lenses? |
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alex ph wrote:
Over several years, I've seen some of your adaptation wonders that apply to various projection lenses. I use myself several ones with no problems on ready-made adapters, the smaller ones on a custom 49mm helocoid, bigger standard lenses on a dedicated 62.5mm one.
Recently I've got a projection lens of 70mm in diameter and feel myself a bit annoyed. To spend for a dedicated helicoid and command one to a lathe craftsman seems exaggerated. To find a cheap mirror lens to disembowel it requires long fishing.
What are your methods to adapt large and rather heavy projection lenses, larger than 62.5 mm? Your know-hows of not very expensive adaptation will be, as always, appreciated. |
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ducnhan1008
Joined: 13 Jul 2018
Posts: 6
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| Posted: Thu Jun 06, 2019 5:27 am Post subject: Re: How do you adapt large projection lenses? |
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ducnhan1008 wrote:
| alex ph wrote: |
Over several years, I've seen some of your adaptation wonders that apply to various projection lenses. I use myself several ones with no problems on ready-made adapters, the smaller ones on a custom 49mm helocoid, bigger standard lenses on a dedicated 62.5mm one.
Recently I've got a projection lens of 70mm in diameter and feel myself a bit annoyed. To spend for a dedicated helicoid and command one to a lathe craftsman seems exaggerated. To find a cheap mirror lens to disembowel it requires long fishing.
What are your methods to adapt large and rather heavy projection lenses, larger than 62.5 mm? Your know-hows of not very expensive adaptation will be, as always, appreciated. |
You can refer below link
http://forum.mflenses.com/viewtopic,p,1526047.html#1526047
That is the focusing adapter i made. |
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DConvert
Joined: 12 Jun 2010
Posts: 921
Location: Essex UK
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| Posted: Thu Jun 06, 2019 7:30 am Post subject: |
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DConvert wrote:
I'm still fishing for a suitable mirror for mine - the one i brought recently proved far too good to disembowel.
I might just end up mounting it via my 5x4 - not the most portable of solutions but should be easy enough to arrange with a little carpentry.  |
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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Thu Jun 06, 2019 2:56 pm Post subject: |
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Blazer0ne wrote:
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Last edited by Blazer0ne on Tue Feb 22, 2022 4:47 pm; edited 1 time in total |
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alex ph
Joined: 16 Mar 2013
Posts: 1674
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| Posted: Tue Jul 09, 2019 8:22 pm Post subject: |
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alex ph wrote:
Thank you for your suggestions, fellows! I see there is no easy solution. I thought even to make a kind of papier-mâché tube with paper and scotch, as a fast and very economic solution, and to glue it to a M42 adapter. But that seems to me quite a fragile construction, seen the lens' size and weight. Well ,I'll take time to think more over it. |
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IAZA
Joined: 16 Apr 2010
Posts: 2587
Location: Indonesia
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| Posted: Wed Jul 10, 2019 1:28 am Post subject: |
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IAZA wrote:
I used tube from can, PVC pipe and plastic bottle. before I modified the lens.
my friend used PVC pipe and paint it black. the lens body was covered with tape, tissue paper or cloth, depend on the space left on tube (pipe)
focusing by push pull.
the main challenge is attach it on proper adapter, I used body from 50mm lens, helicoid and camera adapter
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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Wed Jul 10, 2019 2:24 pm Post subject: |
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Blazer0ne wrote:
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Last edited by Blazer0ne on Tue Feb 22, 2022 7:02 pm; edited 1 time in total |
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visualopsins
Joined: 05 Mar 2009
Posts: 11069
Location: California
Expire: 2025-04-11
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| Posted: Wed Jul 10, 2019 4:14 pm Post subject: |
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visualopsins wrote:
I used two nesting cardboard boxes (18"x24" big) without tops to make a giant camera box, to mount the WA Brown 14 Inch Series 60 Process Lens 
Small eye hole in front to see image lens projects back of box. Focus sliding boxes in & out.
The image projection more than covered the 18x24! 14" is wide angle.
Never got around to exposing film taped inside. Great big piece of Provia would be nice I think.
Here are some links to other threads about mounting large heavy lenses:
http://forum.mflenses.com/dallmeyer-a-m-14in-356mm-f4-with-handmade-brass-m42-adapter-t29617.html
http://forum.mflenses.com/supporting-bellows-with-heavy-lenses-t29415.html
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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-A 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 (151B), 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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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Wed Jul 10, 2019 5:11 pm Post subject: |
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Blazer0ne wrote:
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Last edited by Blazer0ne on Tue Feb 22, 2022 5:24 pm; edited 1 time in total |
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visualopsins
Joined: 05 Mar 2009
Posts: 11069
Location: California
Expire: 2025-04-11
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| Posted: Wed Jul 10, 2019 6:14 pm Post subject: |
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visualopsins wrote:
| Blazer0ne wrote: |
| Quote: |
| ...WA Brown 14 Inch Series 60 Process Lens... |
This lens looks like it was made for taking not projecting, if it has an aperture...
If you remove the board is there enough clearance around the base of the lens to add a pipe hose clamp? |
A Process lens, yes, 5/8" clear, 4 5/8" diameter. Big & heavy.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ 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-A 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 (151B), 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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Blazer0ne
Joined: 12 Sep 2018
Posts: 836
Expire: 2024-12-07
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| Posted: Thu Jul 11, 2019 5:46 pm Post subject: |
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Blazer0ne wrote:
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Last edited by Blazer0ne on Tue Feb 22, 2022 4:47 pm; edited 1 time in total |
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philslizzy
Joined: 07 Aug 2012
Posts: 4745
Location: Cheshire, England
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| Posted: Mon Jul 15, 2019 10:06 pm Post subject: |
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philslizzy wrote:
| alex ph wrote: |
| Thank you for your suggestions, fellows! I see there is no easy solution. I thought even to make a kind of papier-mâché tube with paper and scotch, as a fast and very economic solution, and to glue it to a M42 adapter. But that seems to me quite a fragile construction, seen the lens' size and weight. Well ,I'll take time to think more over it. |
That is a good idea, insert it into a piece of drainpipe for rigidity, perhaps cap the back end and drill a hole in the cap wide enough for an adapter then glue it to the adapter.
When wrapping the lens, smear a thin layer of vaseline along its length and make the first layer or two out of baking paper. When the t
ube is dry the lens should slide in and out for focusing. I did exactly that for (an admittedly smaller) lens.
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Hero in the 'messin-with-cameras-for-the-hell-of-it department'. Official. |
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alex ph
Joined: 16 Mar 2013
Posts: 1674
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| Posted: Sun Aug 25, 2019 8:26 pm Post subject: |
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alex ph wrote:
Wow, some great examples and thoughts of adaptation those not-so-easy monsters. Thank you for the stimulation! |
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