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enzodm
Joined: 11 Sep 2010
Posts: 350
Location: Italy
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 Posted: Fri Feb 01, 2013 2:24 pm Post subject: Focusing helicoid: 12-17mm or 17-31mm? |
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enzodm wrote:
Dear all,
willing to buy a focusing helicoid, the question is as subject, in this sense: do I lose more in those 5mm extra of shortest side, or in those 5mm only of travel? I have macro tubes down to 11mm.
I'm not aimed at a specific lens, although one candidate is an old Kodak Vest Pocket Meniscus.
Thanks!
_________________
Canon 60D, Tamron 17-50VC, Canon 55-250IS, Sigma 50-150/2.8 plus:
Wide: Mir 20/3.5, Kenlock 24/2.8, Tamron 28/2.5, Yashikor 35/2.8, Mir 37/2.8
Fifties: Voigtländer Color Ultron 50/1.8, Pentacon 50/1.8, Zenitar 50/1.9, Leica Summicron 50/2, CZJ Pancolar 50/2, CZJ Tessar 50/2.8, Industar 50/3.5 , Rikenon 55/1.4, Petri 55/1.8, Helios 58/2
In the middle: Cyclop 85/1.5, Nikon 100/2.8
135s: Tamron 135/2.5, CZJ Sonnar 135/3.5, Jupiter 135/3.5, CZJ Triotar 135/4, Tamron Twin Tele 135-225
Tele: Soligor 200/2.8, Pentax Super Takumar 200/4, Hanimex 400/6.3, Makinon 500/8
Various: Schneider-Kreuznach Componar 135/4.5, Tominon 105/4.5, Vest Pocket Kodak meniscus, Wray Supar 2"/4.5
Sony Nex 6 plus:
Industar 69 28/2.8, Fujian 35/1.7, Rokkor 50/1.4, Jupiter 50/2, Cosmicar 50/2.8, Industar-22 50/3.5, Leitz Elmar 90/4, Canon Serenar 100/4
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Sat Feb 02, 2013 8:23 pm Post subject: |
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iangreenhalgh1 wrote:
What camera is it to use with Enzo? You have to consider the register of the camera and the focal length of the lens.
For instance, if using an EOS, you have just under 45mm register, add in 12mm for the shorter helicoid and another 1mm or two for the M42 adapter and you have a minimum of 58mm, which sounds like it will be okay for lenses 75mm and longer. The 17-31 would give you a minimum of 63mm which also sounds like it would be okay, this helicoid covers a longer range so is probably the better option I think.
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I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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enzodm
Joined: 11 Sep 2010
Posts: 350
Location: Italy
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| Posted: Sun Mar 10, 2013 1:44 pm Post subject: |
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enzodm wrote:
Apologies, I discovered this answer only now - disabled email notofication  .
In the meantime I bought the longer version - something lost on the short side, but more flexibility. Thanks Ian !
By the way I found an UK seller with almost chinese prices, if someone is interested: http://www.ebay.it/itm/290780919518
_________________
Canon 60D, Tamron 17-50VC, Canon 55-250IS, Sigma 50-150/2.8 plus:
Wide: Mir 20/3.5, Kenlock 24/2.8, Tamron 28/2.5, Yashikor 35/2.8, Mir 37/2.8
Fifties: Voigtländer Color Ultron 50/1.8, Pentacon 50/1.8, Zenitar 50/1.9, Leica Summicron 50/2, CZJ Pancolar 50/2, CZJ Tessar 50/2.8, Industar 50/3.5 , Rikenon 55/1.4, Petri 55/1.8, Helios 58/2
In the middle: Cyclop 85/1.5, Nikon 100/2.8
135s: Tamron 135/2.5, CZJ Sonnar 135/3.5, Jupiter 135/3.5, CZJ Triotar 135/4, Tamron Twin Tele 135-225
Tele: Soligor 200/2.8, Pentax Super Takumar 200/4, Hanimex 400/6.3, Makinon 500/8
Various: Schneider-Kreuznach Componar 135/4.5, Tominon 105/4.5, Vest Pocket Kodak meniscus, Wray Supar 2"/4.5
Sony Nex 6 plus:
Industar 69 28/2.8, Fujian 35/1.7, Rokkor 50/1.4, Jupiter 50/2, Cosmicar 50/2.8, Industar-22 50/3.5, Leitz Elmar 90/4, Canon Serenar 100/4
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