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kds315*
Joined: 12 Mar 2008
Posts: 2877
Location: Weinheim/Germany
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 Posted: Sat May 09, 2009 11:26 am Post subject: |
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| Jieffe wrote: | | my_photography wrote: | | Sorry to ask this question but what is the advantage of helicoid as compared to extension tubes? Different purposes? |
The helicoid is the macro equivalent of a zoom lens compared to .primes. You don't need to swap tubes to change magnification. |
I would not use the term "zoom lens" here, since it implies a variation of focal length - which it is not. It is a simple focusing device or variable extention tube which allows a change in magnification.
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Klaus
http://www.macrolenses.de for macro and special lens info
http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info
http://photographyoftheinvisibleworld.blogspot.com/ my UV diary
Currently most FAV lens(es):
Nikon UV Nikkor f4.5/105mm
Voigtländer (Cosina) Apo-Makro-Lanthar f2.5 125mm SL
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Jieffe
Joined: 04 Nov 2007
Posts: 661
Location: Brugelette, Belgium
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| Posted: Sat May 09, 2009 12:10 pm Post subject: |
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| my_photography wrote: | | So this is meant for macro shooting only? Can I shoot till infinity? |
Yes, as with extension tubes.
_________________
The gear I use : Pentax K200D & Samsung GX1s, a few Tamron, Pentax, East German and Russian lenses.
(Modded Sony DSC-V1 for Infrared)
Gimp & Ufraw on Linux Zenwalk
Flick : www.flickr.com/photos/jieffe |
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Jieffe
Joined: 04 Nov 2007
Posts: 661
Location: Brugelette, Belgium
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| Posted: Sat May 09, 2009 12:13 pm Post subject: |
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| kds315* wrote: | | I would not use the term "zoom lens" here, since it implies a variation of focal length |
Correct. I was using "zoom" as a shortcut to "ability to change the magnification factor without swapping extension tubes".
_________________
The gear I use : Pentax K200D & Samsung GX1s, a few Tamron, Pentax, East German and Russian lenses.
(Modded Sony DSC-V1 for Infrared)
Gimp & Ufraw on Linux Zenwalk
Flick : www.flickr.com/photos/jieffe |
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Screamin Scott
Joined: 13 Oct 2007
Posts: 816
Location: Dallas, Georgia USA
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| Posted: Sat May 09, 2009 1:44 pm Post subject: |
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Kinda like a Vivitar 2x macro converter...The variable magnification factor makes something like this so much more useful as you simply turn the ring to change ratios instead of adding or subtracting tubes...Makes composition easier too...
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Cameras-Nikon D70s,N2000,FE2,FTN ,FT2,N90s &N70
Nikkor AF Zooms=28-105/3.5D,18-55/3.5GS,28-70/3.5D,35-135/3.5
Nikkor AF //50/1.8,//Nikkor MF//50/2ai,50/1.8ais 50/1.4ai,24/2.8ais,28/2.8ai,28/3.5ai,55microAis/2.8,105/2.5ai,200/4ai,300/4.5ai35-135/3.5Ais
Kiron /Kino madelenses//70-210/4ai,28-105/3.2ai,30-80/3.5ai,Viv 28/2ai,35-85/2.8aiVivS1,105/2.8AisDine,24-48/3.8ai VivS1,50-150/3.8aiViv,28-85/2.8aiViv,100/2.8Nai Viv,70-210/3.5Nai Viv,28/2.5ai VivKomine made Viv//24/2Ais,135/2.8aiCF,28-50/3.5ai,28-90/2.8ai Viv S1,80-200/4.5aiCosina made Viv 19/3.8 Ais...Also Sigma 24/2.8 Ais Tokina made24/2.8ai VivAF Sigma 21-35/3.5,& other lenses |
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Jieffe
Joined: 04 Nov 2007
Posts: 661
Location: Brugelette, Belgium
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| Posted: Sat May 09, 2009 1:52 pm Post subject: |
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| Screamin Scott wrote: | | Kinda like a Vivitar 2x macro converter... |
As a matter of fact, I made my own helicoid by removing the lenses of a vivitar macro converter.
_________________
The gear I use : Pentax K200D & Samsung GX1s, a few Tamron, Pentax, East German and Russian lenses.
(Modded Sony DSC-V1 for Infrared)
Gimp & Ufraw on Linux Zenwalk
Flick : www.flickr.com/photos/jieffe |
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my_photography
Joined: 03 Nov 2008
Posts: 891
Location: Pearl of the Orient
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| Posted: Mon May 11, 2009 5:08 am Post subject: |
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| my_photography wrote: | | hk300 wrote: | (other screw type are also available)
Canon FD-M42
Minolta AF-M42
ContaxC/Y-M42
Tamron-M42
Nikon-M42
and i may be able to produce or source other ones. |
Does this mean I will be able to mount my Minolta lens to Canon bodies? (Minolta lens to helicoid M42 and M42-Canon adapter)? Also, does it mean I can now use Contax C/Y lens on my Minolta/Sony body? |
Anyone knows if this is possible?
Contax C/Y helicoid M42 then M42 to Minolta/Sony A mount?
Minolta/Sony A mount to helicoid M42 then M42 to Canon EF mount?
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Zeiss: CJZ Flektogon 20/2.8, Tessar 50/2.8, CJZ Pentacon 29/2.8, CJZ Flektogon 35/2.4, CJZ Pancolar 50/1.8, Biotar 7.5cm/1.5, CJZ Pancolar 80/1.8, CJZ Sonnar 135/3.5, CJZ Pentacon 135/2.8 CJZ Sonnar 200/2.8
Other Germany: Meyer Primoplan 50/1.8
Takumar: SMC 50/1.4 Super Tak 55/2, S-M-C 135/3.5, Super Tak 150/4
Russian: Zenith 16/2.8, Mir-24M 2/35, Volna-9 50/2.8, Helios 44M (58/2), Helios 44M-3 MC (58/2), Helios 40 (85/1.5), Tair 11A (135/2.8 )
Others: Sears 28/2.8, Sankor 35/2.8, Enna München Tele-Ennalyt 135/3.5
Zoom Sigma Zoom 28-85/3.5-4.5
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kds315*
Joined: 12 Mar 2008
Posts: 2877
Location: Weinheim/Germany
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Scribo
Joined: 17 Nov 2008
Posts: 19
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| Posted: Thu Jun 04, 2009 4:22 am Post subject: |
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I wonder if someone who has examined one of these helicoids can answer a question.
I have a barrel lens, 43mm outside diameter, that I would like to mount. Thye barrel isn't threaded--it's strictly smooth (it was removed from a rack-and-pinion focusing tube).
My question is how the lens is held in the helicoid. Is it screwed in, or is there some other arrangement to hold it in place? I've looked at the pics, and it's not clear to me.
Thanks for all assistance. I did ask the seller via the auction site, and got a prompt and courteous reply, which unfortunately didn't address all of my questions. |
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Shiladitya
Joined: 31 May 2008
Posts: 223
Location: New Delhi, India
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| Posted: Thu Jun 11, 2009 9:39 am Post subject: |
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| Jieffe wrote: | | As a matter of fact, I made my own helicoid by removing the lenses of a vivitar macro converter. |
Hi Jieffe, Can you share some more details. I am dabbling with this idea for sometimes now.
Thanks
_________________
Camera: Nikon F4s, Nikon FG, FE2, FM2n, FA; Pentax K1000, Spotmatic II, MZ60; Exakta Varex IIb, Olympus OM1n; Yashica Mat 124G, Agfa Isolette III, Voigtlander Prominent
Lenses: Nikkor- 2.8/55 Micro, 1.4/50 AIS, 1.2/55 AI, 2.8/24 AIS, 2.8/20 AIS, 4/200 AIS, 2.5/105 AIS
Pentax K: SMC 1.7/50, 2.8/24, 3.5/135, 4/200 & 4.5/80-200
M42: SMC Tak 1.8/55, SMC Tak 3.5/28, SMC Tak 3.5/135, Super Tak 4/200, Yasinon DX 1.7/50
Zuiko: 1.8/50, 3.5/28
Exakta: Pancolar 2/50, Pentacon 3.5/30, Enna 4.5/240
Prominent: Ultron 2/50 |
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Jieffe
Joined: 04 Nov 2007
Posts: 661
Location: Brugelette, Belgium
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| Posted: Thu Jun 11, 2009 11:17 am Post subject: |
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| Shiladitya wrote: | | Jieffe wrote: | | As a matter of fact, I made my own helicoid by removing the lenses of a vivitar macro converter. |
Hi Jieffe, Can you share some more details. I am dabbling with this idea for sometimes now.
Thanks |
I had for a long time a Kiron-made "Vivitar 2x macro focusing teleconverter" in Pentax K mount. It was supposed to be better (or "less worse") than other converters, having 7 MC elements.
As I never used it, I decided to remove all the lenses (after disassembly and a bit of dremeling if I remember correctly).
I now have a variable extension ring going from 4.4cm to 6cm fully extended.
Closed :
Extended :
Inside : (ignore the glued mount, I misplaced the original mount and used a M42-K converter  )
_________________
The gear I use : Pentax K200D & Samsung GX1s, a few Tamron, Pentax, East German and Russian lenses.
(Modded Sony DSC-V1 for Infrared)
Gimp & Ufraw on Linux Zenwalk
Flick : www.flickr.com/photos/jieffe |
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Attila
Joined: 24 Feb 2007
Posts: 27458
Location: Budapest,Hungary
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| Posted: Thu Jun 11, 2009 11:28 am Post subject: |
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This is a good idea , especially if you can get on bargain price. I have two copies from this converter and I think pretty good one.
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[color=black][b]35mm rangefinderKonica III,Bessa L,Yashica Electro GN,Canonette QL 17
35mm SLRKonica FM,Konica FP,Konica FT-1,Konica FC-1,Konica TC4,Nikon FA,Exakta VarexIIa,Fujica ST801
Carl Zeiss Jena:Flektogon 2.8/20mm,4/25mm,2.4/35,2.8/65mm,4.5/4cm Tessar, 8/500mm Fernobjektiv
Pancolar 1.4/55mm,1.8/50mm,1.8/80mm,Tessar 2.8/50mm,Biotar 2/58mm,1.5/75mm,1.5/7,5cm
Carl Zeiss: Sonnar 2.8/135,2.8/180mm,Tessar 4/135mm
Nikon:2.8/20mm, 2.8/28mm,1.4/35mm,1.4/50mm,2/50mm,1.8/85mm,2/85mm,2.8/135mm
Pentax: Pentax 1.2/50mm,1.8/85mm,4/200mm
Helios: Helios-40 1.5/8,5cm,Helios-44-1 2/58mm,Helios-44-2 2/58mm
Olympus OM: 3.5/18mm,3.5/21mm,3.5/55mm macro,2/90mm macro,35-70mm
Meyer: 4.5/35mm Primagon,Primoplan 1.9/58mm,1.9/75mm,2.8/100mm,Orestegor 2.8/135mm,4.5/40 Helioplan
Leica: 4/100 Macro
Konica:21mm f4, 28mm f3.5,35mm f2.8,50mm f1.4,57mm f1.2,85mm f1.8,100mm f2.8,135mm f3.5,135mm f3.2,200mm f3.5,4/300mm,40cm f4.5
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Shiladitya
Joined: 31 May 2008
Posts: 223
Location: New Delhi, India
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| Posted: Thu Jun 11, 2009 4:40 pm Post subject: |
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| Jieffe wrote: | | Shiladitya wrote: | | Jieffe wrote: | | As a matter of fact, I made my own helicoid by removing the lenses of a vivitar macro converter. |
Hi Jieffe, Can you share some more details. I am dabbling with this idea for sometimes now.
Thanks |
I had for a long time a Kiron-made "Vivitar 2x macro focusing teleconverter" in Pentax K mount. It was supposed to be better (or "less worse") than other converters, having 7 MC elements.
As I never used it, I decided to remove all the lenses (after disassembly and a bit of dremeling if I remember correctly).
I now have a variable extension ring going from 4.4cm to 6cm fully extended. |
This is great... I have been eyeing this converter (7 MC element) in Nikon mount. Its works out much cheaper than the helicoid tubes (with different extension lengths off course)
How do I find out the focus distance that it will give me for my EL nikkor 50/2.8 (both with the glass elements i.e. 2X FL and without the glass elemets)
Anyway I think I will try this before I choose to buy the more expensive helicoid tubes.
Jieffe, does removing the glass elements make this a permanent variable extension or the glasses can be fit ince again... I mean is the operation of removing the glasses too complex?
| Quote: | | This is a good idea , especially if you can get on bargain price. I have two copies from this converter and I think pretty good one. |
Yes Atilla, I am looking for one at an affordable price.
_________________
Camera: Nikon F4s, Nikon FG, FE2, FM2n, FA; Pentax K1000, Spotmatic II, MZ60; Exakta Varex IIb, Olympus OM1n; Yashica Mat 124G, Agfa Isolette III, Voigtlander Prominent
Lenses: Nikkor- 2.8/55 Micro, 1.4/50 AIS, 1.2/55 AI, 2.8/24 AIS, 2.8/20 AIS, 4/200 AIS, 2.5/105 AIS
Pentax K: SMC 1.7/50, 2.8/24, 3.5/135, 4/200 & 4.5/80-200
M42: SMC Tak 1.8/55, SMC Tak 3.5/28, SMC Tak 3.5/135, Super Tak 4/200, Yasinon DX 1.7/50
Zuiko: 1.8/50, 3.5/28
Exakta: Pancolar 2/50, Pentacon 3.5/30, Enna 4.5/240
Prominent: Ultron 2/50 |
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Jieffe
Joined: 04 Nov 2007
Posts: 661
Location: Brugelette, Belgium
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| Posted: Thu Jun 11, 2009 8:29 pm Post subject: |
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| Shiladitya wrote: | | How do I find out the focus distance that it will give me for my EL nikkor 50/2.8 (both with the glass elements i.e. 2X FL and without the glass elemets) |
I dont have the glass elements anymore, so can't tell you. With a 50mm set to infinity, the focus distance is about 4-5 cm depending of the extension.
The real-life object I can photography at max extension is 2cm wide,
| Quote: | | Jieffe, does removing the glass elements make this a permanent variable extension or the glasses can be fit ince again... I mean is the operation of removing the glasses too complex? |
Well, I had to break a few pieces to remove the glasses. Maybe someone more careful could disassemble the converter and keep the ability to re-assemble it later ... not sure about that one.
_________________
The gear I use : Pentax K200D & Samsung GX1s, a few Tamron, Pentax, East German and Russian lenses.
(Modded Sony DSC-V1 for Infrared)
Gimp & Ufraw on Linux Zenwalk
Flick : www.flickr.com/photos/jieffe |
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Shiladitya
Joined: 31 May 2008
Posts: 223
Location: New Delhi, India
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| Posted: Fri Jun 12, 2009 9:54 am Post subject: |
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| Jieffe wrote: | | Shiladitya wrote: | | How do I find out the focus distance that it will give me for my EL nikkor 50/2.8 (both with the glass elements i.e. 2X FL and without the glass elemets) |
I dont have the glass elements anymore, so can't tell you. With a 50mm set to infinity, the focus distance is about 4-5 cm depending of the extension.
The real-life object I can photography at max extension is 2cm wide,
| Quote: | | Jieffe, does removing the glass elements make this a permanent variable extension or the glasses can be fit ince again... I mean is the operation of removing the glasses too complex? |
Well, I had to break a few pieces to remove the glasses. Maybe someone more careful could disassemble the converter and keep the ability to re-assemble it later ... not sure about that one. |
Great Thanks. I think for now this is the way to go for me.
_________________
Camera: Nikon F4s, Nikon FG, FE2, FM2n, FA; Pentax K1000, Spotmatic II, MZ60; Exakta Varex IIb, Olympus OM1n; Yashica Mat 124G, Agfa Isolette III, Voigtlander Prominent
Lenses: Nikkor- 2.8/55 Micro, 1.4/50 AIS, 1.2/55 AI, 2.8/24 AIS, 2.8/20 AIS, 4/200 AIS, 2.5/105 AIS
Pentax K: SMC 1.7/50, 2.8/24, 3.5/135, 4/200 & 4.5/80-200
M42: SMC Tak 1.8/55, SMC Tak 3.5/28, SMC Tak 3.5/135, Super Tak 4/200, Yasinon DX 1.7/50
Zuiko: 1.8/50, 3.5/28
Exakta: Pancolar 2/50, Pentacon 3.5/30, Enna 4.5/240
Prominent: Ultron 2/50 |
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kds315*
Joined: 12 Mar 2008
Posts: 2877
Location: Weinheim/Germany
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