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#1
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Rolleiflex F2.8 and optically flat glass
Reading the manual for the F2.8, it mentions an optional optically flat
glass(beveled) that can be inserted on the existing pressure plate to make it especially flat for increased sharpness. Is anyone familiar with this and does it really make that much of a differance? I have three Rollei books and they all devote a small paragraph to this piece which makes me think it is mostly a useless item, however Rollei did put a small pocket in their camera case to carry this item around. Because it is a thin piece of glass I wonder too if they all broke making the user just give up altogether in using it. If I am wrong about this and it is deemed to be a worthwhile item, does anyone know where to get one? |
#2
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Dan,
I saw one once in a Tele-Rollei, where it seems to me, that it might have some effect, since telephotos have much less depth of field than normal focal-length lenses. But I used the Rollei 2.8 for some years and never noticed any lack of sharpness without the glass. Admittedly, I rarely shot with it wide open--- usually stopped down at least two stops or more, but I'm very pleased with the 11X14's I made with it. Larry Dan wrote: Reading the manual for the F2.8, it mentions an optional optically flat glass(beveled) that can be inserted on the existing pressure plate to make it especially flat for increased sharpness. Is anyone familiar with this and does it really make that much of a differance? I have three Rollei books and they all devote a small paragraph to this piece which makes me think it is mostly a useless item, however Rollei did put a small pocket in their camera case to carry this item around. Because it is a thin piece of glass I wonder too if they all broke making the user just give up altogether in using it. If I am wrong about this and it is deemed to be a worthwhile item, does anyone know where to get one? |
#3
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LR Kalajainen wrote:
Dan, I saw one once in a Tele-Rollei, where it seems to me, that it might have some effect, since telephotos have much less depth of field than normal focal-length lenses. But a tele has more depth of focus so a flat film plane isn't a critical as on a normal or a wide angle lens. I do agree this glass plate will probably cause more problems than it will fix. -- Stacey |
#4
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LR Kalajainen wrote:
Dan, I saw one once in a Tele-Rollei, where it seems to me, that it might have some effect, since telephotos have much less depth of field than normal focal-length lenses. But a tele has more depth of focus so a flat film plane isn't a critical as on a normal or a wide angle lens. I do agree this glass plate will probably cause more problems than it will fix. -- Stacey |
#5
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In message .com, Dan
writes Because it is a thin piece of glass I wonder too if they all broke making the user just give up altogether in using it. I would guess that most folks gave up using the glass because it was impossible to keep it clean enough. -- ---------------------------- Paul Friday |
#6
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In message .com, Dan
writes Because it is a thin piece of glass I wonder too if they all broke making the user just give up altogether in using it. I would guess that most folks gave up using the glass because it was impossible to keep it clean enough. -- ---------------------------- Paul Friday |
#7
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I'd worry more about dust on the glass plate than on any improvement in
sharpness it might add. Stacey wrote: LR Kalajainen wrote: Dan, I saw one once in a Tele-Rollei, where it seems to me, that it might have some effect, since telephotos have much less depth of field than normal focal-length lenses. But a tele has more depth of focus so a flat film plane isn't a critical as on a normal or a wide angle lens. I do agree this glass plate will probably cause more problems than it will fix. |
#8
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I'd worry more about dust on the glass plate than on any improvement in
sharpness it might add. Stacey wrote: LR Kalajainen wrote: Dan, I saw one once in a Tele-Rollei, where it seems to me, that it might have some effect, since telephotos have much less depth of field than normal focal-length lenses. But a tele has more depth of focus so a flat film plane isn't a critical as on a normal or a wide angle lens. I do agree this glass plate will probably cause more problems than it will fix. |
#9
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Never seen this glass plate for the back.
But I have two Rolleiflex and I don't miss the glass plate. There's enough sharpness the same. For sharpness, IMO it's better to have an accurate focusing knob and a hood clear. ciaO!! -- ed io imparo... |
#10
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Never seen this glass plate for the back.
But I have two Rolleiflex and I don't miss the glass plate. There's enough sharpness the same. For sharpness, IMO it's better to have an accurate focusing knob and a hood clear. ciaO!! -- ed io imparo... |
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