100 mm F3.5 Macro
Posted 24/04/2004 - 10:16
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The Pentax 100mm f3.5 Macro uses a configration of 5 elements in four groups, similar or identical to the 100mm f4 lenses that have been sold since the Spotmatic days.
The quality you can obtain from this is very high indeed, coupled with a flat field (necessary for copying of flat subjects such as documents) and very low distortion (straight lines remain straight even at the frame edges)
The front element is also deeply recessed, removing the need for a lens hood unless filters are attached.
The lens is excellent for close up work, portraiture and landscape phtography and, despite its plasticky feel it seems solidly made and I have been very pleased with the results.
The quality you can obtain from this is very high indeed, coupled with a flat field (necessary for copying of flat subjects such as documents) and very low distortion (straight lines remain straight even at the frame edges)
The front element is also deeply recessed, removing the need for a lens hood unless filters are attached.
The lens is excellent for close up work, portraiture and landscape phtography and, despite its plasticky feel it seems solidly made and I have been very pleased with the results.
Best regards, John
Posted 07/05/2004 - 18:52
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Just got back slides using the new lens.
Just as you wrote, Mr. Riley. Very nice, indeed.
Cheers,
Bob
Just as you wrote, Mr. Riley. Very nice, indeed.
Cheers,
Bob
Posted 08/05/2004 - 11:44
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Bob,
You asked for comments regarding the use of such lenses but you didn't indicate which one you actually had.
Pentax glass is renowned for quality and there's a certain aesthetic appeal that devoted Pentax users appreciate but as with all top brands, it comes at a price.
If you are pleased with the results from you lens and it's a cheaper alternative, then your recommendation could well help those of us that can't afford the Pentax.
Kim.
You asked for comments regarding the use of such lenses but you didn't indicate which one you actually had.
Pentax glass is renowned for quality and there's a certain aesthetic appeal that devoted Pentax users appreciate but as with all top brands, it comes at a price.
If you are pleased with the results from you lens and it's a cheaper alternative, then your recommendation could well help those of us that can't afford the Pentax.
Kim.
Die my dear doctor, that's the last thing I shall do!
Posted 10/05/2004 - 20:01
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I use an old Tamron 90mm Adaptall lens on my Pentax cameras. I can recommend the optical quality for both macro and portraits.
I also have a Sigma 105mm EX lens for my non-pentax slrs, which gives similar results.
I also have a Sigma 105mm EX lens for my non-pentax slrs, which gives similar results.
Posted 13/05/2004 - 15:59
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I have several adaptall lenses and have recently been looking for a 90mm.
They still seem to be holding their value on the 2nd-hand market (which is an indication of quality) but I missed out on a nice one on eBay that sold for just £31.
The real bummer, was the fact that the seller was local and I could have picked it up and saved the postage
They still seem to be holding their value on the 2nd-hand market (which is an indication of quality) but I missed out on a nice one on eBay that sold for just £31.
The real bummer, was the fact that the seller was local and I could have picked it up and saved the postage
Die my dear doctor, that's the last thing I shall do!
Posted 13/05/2004 - 17:34
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n/t
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14 posts
22 years
Arabia
Any advantages or disadvantages of the various versions? Is this lens useful as a short telephoto or portrait lens as well as a macro?
Thanks,
Bob in Arabia