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xjjohnno
Joined: 07 Apr 2009
Posts: 1270
Location: Melbourne Australia
Expire: 2011-11-18
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 Posted: Sat Apr 10, 2010 8:11 am Post subject: TV zoom lens |
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xjjohnno wrote:
Not sure if this should be in the Cine section, if so feel free to move.
Anyone know anything about this lens? The mount is M42 or at least it fits my M42 adapter. It won't provide a legible image so the obvious is that it has a different register and probably well under the normal M42 mount lenses. I have seen a similar item listed on Fleabay that claimed it would work on the micro 4/3 system.
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kansalliskala
Joined: 19 Jul 2007
Posts: 5038
Location: Southern Finland countryside
Expire: 2016-12-30
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| Posted: Sat Apr 10, 2010 8:37 am Post subject: Re: TV zoom lens |
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kansalliskala wrote:
| xjjohnno wrote: |
| It won't provide a legible image so the obvious is that it has a different register and probably well under the normal M42 mount lenses. |
Simplest way to check register is just get some visible illuminated object like a lamp with shade. Put the distance scale to how far the object is and then move a white paper behind the lens. When the picture is sharp you can estimate the register distance.
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unclemack
Joined: 21 Jun 2009
Posts: 51
Location: UK frozen north
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| Posted: Sat Apr 10, 2010 12:07 pm Post subject: |
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unclemack wrote:
My understanding is that lenses intended for TV use were optimised for contrast with little regard to sharpness, TV being of such low resolution compared to... erm... everything? |
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rbelyell
Joined: 13 Oct 2009
Posts: 4269
Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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| Posted: Sat Apr 10, 2010 12:29 pm Post subject: |
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rbelyell wrote:
it looks to me that the mount doesnt match the lens; this probably was a c mount lens, as i have a similar one in c mount.
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xjjohnno
Joined: 07 Apr 2009
Posts: 1270
Location: Melbourne Australia
Expire: 2011-11-18
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| Posted: Sat Apr 10, 2010 1:12 pm Post subject: |
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xjjohnno wrote:
| rbelyell wrote: |
| it looks to me that the mount doesnt match the lens; this probably was a c mount lens, as i have a similar one in c mount. |
Tell me more.
EG register distance. |
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visualopsins
Joined: 05 Mar 2009
Posts: 10960
Location: California
Expire: 2025-04-11
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| Posted: Sat Apr 10, 2010 1:53 pm Post subject: |
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visualopsins wrote:
| xjjohnno wrote: |
| rbelyell wrote: |
| it looks to me that the mount doesnt match the lens; this probably was a c mount lens, as i have a similar one in c mount. |
Tell me more.
EG register distance. |
M42?! I'm pretty sure also that is a c-mount lens. Is that a removable silver-colored c-mount to M42 screw-on adapter? Maybe someone was using with M42 bellows...
Sorry don't have specs on image circle size of this lens (manufacturer?); C-mount camera register is 0.69" (17.526mm), and thread is 1"x32tpi.
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M42 Carl Zeiss Jena Flektogon 2.4/35
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LucisPictor
Joined: 26 Feb 2007
Posts: 17633
Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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| Posted: Sat Apr 10, 2010 2:12 pm Post subject: |
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LucisPictor wrote:
Well, if you get to use it on µ4/3, it offers very nice parameters.
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rbelyell
Joined: 13 Oct 2009
Posts: 4269
Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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| Posted: Sun Apr 11, 2010 12:59 am Post subject: |
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rbelyell wrote:
john, dont know the register distance etc, but i do think if you can remove the overlay m42 mount, you may find the c mount below. if so, youre home free, right?
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Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
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take me as i come 'cause i can't stay long' |
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xjjohnno
Joined: 07 Apr 2009
Posts: 1270
Location: Melbourne Australia
Expire: 2011-11-18
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| Posted: Sun Apr 11, 2010 1:33 am Post subject: |
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xjjohnno wrote:
Another view of the mount. Me using Pentax the lens will be totally useless. But then it was thrown in as part of a batch buy as a free extra so no loss on my part.
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rbelyell
Joined: 13 Oct 2009
Posts: 4269
Location: somewhere in the mountains of central NY
Expire: 2014-01-31
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| Posted: Sun Apr 11, 2010 12:22 pm Post subject: |
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rbelyell wrote:
oh yes, thats true; i thought you wanted to put the lens on an m4/3 camera--then w orig c mount it will work very well.
btw, these go for a decent amount on ebay, so if you can get it back to orig mount, you can make some money!
_________________
Epson RD1 + Elmarit 21/2.8; Summarit 50/1.5; Summarit 75/2.5; Elmar-c 90/4; Sankyo Komura 135/2.8, Hektor 135/4.5; Braun Paxina 29 6x6; Photax Boyer Paris; Holga 120 Pano
GREAT STUFF FOR SALE:
Contax T
Hasselblad XPan + 45/4, 90/4
Kodak Retina Reflex IV + full set of Schneider Krueznach lenses
Mercury 2 half frame 35mm
Kodak Pro slr/n
Fuji GM670+100/3.5+65/8!
Praktisix 6x6 medium format + ZeissBiometar 120/2.8
Bessa T 101 Anniversary Edition in Navy Blue
Mamiya Six Folder with Zuiko 75/3.5
Adaptall: Tamron SP 28-85 macro
Cameras: Canon IX
PM for more complete descriptions/pix. All in great shape!
_________________________
'buy me a drink, sing me a song,
take me as i come 'cause i can't stay long' |
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