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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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 Posted: Mon Jun 27, 2011 1:26 pm Post subject: Rodenstock Apo-Ronar 240mm f9 |
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martyn_bannister wrote:
A weighty little lens which I managed to lash to some bellows. It has a curious lever device immediately ahead of the aperture scale, which appears to do nothing. Perhaps disconnected? Any idea what it is meant to do?
Seems a reasonable performer to my eyes. Certainly colours are good away from infinity......
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RioRico
Joined: 12 Mar 2010
Posts: 1120
Location: California or Guatemala or somewhere
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| Posted: Mon Jun 27, 2011 2:19 pm Post subject: |
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RioRico wrote:
I have a cheap nameless little Japanese-made 90/4.5 EL with a protruding lever that easily unscrews for removal. It seems intended as an iris-selling aid. Is the lever on your lens removable? Is it usable to set the aperture?
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iangreenhalgh1
Joined: 18 Mar 2011
Posts: 15679
Expire: 2014-01-07
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| Posted: Mon Jun 27, 2011 2:39 pm Post subject: |
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iangreenhalgh1 wrote:
Nice Martin, looks sharper than my Ross Xpress 8.5 inch f4.5 on bellows, I find my setup with the Ross on bellows a lot of fun, hope you enjoy this Ronar as much!
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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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martyn_bannister
Joined: 23 May 2010
Posts: 1151
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| Posted: Mon Jun 27, 2011 3:53 pm Post subject: |
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martyn_bannister wrote:
| RioRico wrote: |
| I have a cheap nameless little Japanese-made 90/4.5 EL with a protruding lever that easily unscrews for removal. It seems intended as an iris-selling aid. Is the lever on your lens removable? Is it usable to set the aperture? |
The lever is a flat blade and cannot be unscrewed. It is entirely unconnected to the iris. In fact it is part of, and rotates, an internal round plate in front of the iris housing. Perhaps it was designed to hold an internal polarising filter? Pure guess. Cetainly does nothing at the moment! |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Mon Jun 27, 2011 4:58 pm Post subject: |
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luisalegria wrote:
This should be an extremely sharp lens for typesetting.
The results look excellent close up, which is what this thing is meant for of course.
This is an early four element dialyte (4 in 4 groups) hence contrast isn't going to be great.
This is a somewhat "long" lens as these things go, so coverage in large format at infinity is probably just 4x5.
I suspect the extra lever may be for a fixed stop/setting; being a process lens one generally wouldn't be changing exposure I would think.
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exaklaus
Joined: 11 Aug 2009
Posts: 1633
Location: Niederrhein, Germany
Expire: 2011-12-02
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| Posted: Mon Jun 27, 2011 9:12 pm Post subject: |
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exaklaus wrote:
Maybe this lever opens or closes a slot for an insert diaphragm mask, like the waterhouse stops.
Klaus
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