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Message |
    
Barnum
Tinkerer
Username: Barnum
Post Number: 186
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 14, 2010 - 06:25 am: | 
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I picked up a couple of interesting items this weekend. Cannot find much info' on them.
Helioprint 150/F1.9 lens. German. Possibly for 10x8".
EOS black case selenium light meter.
Any erudite information/comments? |
Glenn
Tinkerer
Username: Glenn
Post Number: 859
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, November 14, 2010 - 08:50 am: |
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The only Helioprint lenses I have experience with are Process Lenses - I suspect your lens is a 150/1:9 example. Note the ':' and not as you quote '.', meaning the lens is f9 and certainly not f1.9!
Around ten years ago, the world was awash with used/surplus process lenses as the printing industry ditched their traditional methods and went over to digital scanning techniques. When used at their optimum aperture these lenses offer extreme sharpness - in many cases although a lens has aperture detents for values from say f8 to f22, only one position will have an actual value engraved against it. On many lenses this will be for the f22 position, thus marking the optimum operating aperture.
The downside in adapting these lenses for general large format photography is the difficulty of mounting them in a suitable shutter. One finds that the internet around 2002 was full of DIY solutions aimed at using these very cheap, but optically superb lenses, on large format cameras.
Your lens will offer optimum coverage on 7"x5", the corners on a 10"x8" will certainly not be perfect |
Barnum
Tinkerer
Username: Barnum
Post Number: 187
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 15, 2010 - 01:10 pm: |
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Hello Glenn
Thanks for the info'. Of course you are correct regarding aperture. Weekend lunch usually involves the popping of corks, hence my faux pas. HIC!! |
Glenn
Tinkerer
Username: Glenn
Post Number: 860
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, November 15, 2010 - 05:58 pm: |
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Ain't a lunch without a few corks on the floor!! |
Barnum
Tinkerer
Username: Barnum
Post Number: 188
Registered: 10-2007
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 16, 2010 - 12:12 pm: |
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Not to mention yours truly. That is when I know I have had enough. I fall over! I have but one remaining ambition. When I go I will take the crematorium with me! |
Benlin910
Tinkerer
Username: Benlin910
Post Number: 1
Registered: 12-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 10, 2010 - 12:10 am: |
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Thanks you for the post.
Hi guys, Im a newbie. Nice to join this forum.
__________________
http://watchonlinemoviez.net |
