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02-21-2009, 05:10 AM   #16
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QuoteOriginally posted by Nimrad Quote
I know that it doesn't change physically. My point is that the 80-200 mm will look like a 80-200mm on a 35 mm, but the sigma 70-200mm will look like a 105-300mm lens on a 35 mm. Or am I wrong?
You are wrong. The Sigma 70-200 will look like a 70-200 on a 35 mm SLR, but will look like a 105-300 an an APS-C dSLR. The fact that the lens was designed with a FF format in mind doesn't change anything to the field of view. What makes the difference is the size of the sensor (film).

02-21-2009, 05:30 AM   #17
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QuoteOriginally posted by Nimrad Quote
I know that it doesn't change physically. My point is that the 80-200 mm will look like a 80-200mm on a 35 mm, but the sigma 70-200mm will look like a 105-300mm lens on a 35 mm. Or am I wrong?
Yes, wrong. I cannot understand, why a 70-200 would be different from a 80-200 (apart from the tiny 10mm at the short end)? Your basic thinking is flawed. The 80-200 on a 35mm camera behaves like a 80-200 on 35mm. The 70-200 behaves like a 70-200 on a 35mm camera. That's all - no mysterious around the corner thinking necessary.

And both lenses mounted on a APS-C camera basically provide the angle of view, which a 120-300mm lens would give mounted to a 35mm camera.

The point is: Whether a lens is expressedly made for APS-C or for 35mm or for 8x10-inch large format makes no difference. The focal length of a 300mm lens will always be 300mm and the 300mm large format lens will exactly provide the same angle of view, the same aperture stops etc, as a dedicated APS-C 300mm lens would do - if you mount the lenses on the same camera body.

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02-21-2009, 06:08 AM   #18
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Okay, thank you for a wonderful post!
A last question: if I can get this lens for 1170 us dollars is it a must-buy?
02-21-2009, 06:45 AM   #19
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QuoteOriginally posted by Nimrad Quote
Okay, thank you for a wonderful post!
A last question: if I can get this lens for 1170 us dollars is it a must-buy?
Nobody can answer that for you. You are the one who knows what kind of pictures you like to take and if that focal length is right for you. I think I would go for it since I often take pictures in that focal length range, but that is a personal call. Good luck solving your dilemna.

02-21-2009, 08:01 AM   #20
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I mean compared to other similar lenses. Like the sigma 70-200
02-21-2009, 08:14 AM   #21
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QuoteOriginally posted by Nimrad Quote
I mean compared to other similar lenses. Like the sigma 70-200
This is the difficult part to answer. The price you quoted seems very good, if the FA 80-200 is in good condition. On the other hand, the Sigma is cheaper and would be brand new for a lot less money. So you have to decide, what is more important for you: the brand and rare opportunity for a good buy or the lower cost and warranty, which comes with a new lens.

In terms of performance, the Sigma is a sharp lens. I have the older Sigma version, without macro setting and can only heartily recommend it. The image quality is simply excellent, even when used fully open. The same seems to be true for the FA - but I never bought one, because I found it too heavy and too big and too expensive as a used item. But at that price, I must confess, I would be tempted...

I would say, it is not a "must" buy, but a very good opportunity (provided the lens is o.k.)

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02-21-2009, 08:17 AM   #22
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At that price buy it. At $1500 or more don't. I agree with Ben above.
I've owned both the older Sigma and the FA*80-200mm. I sold the Pentax because of the weight. In terms of picture quality, the 2 are evenly matched but the Pentax does a nicer job with the backgrounds (only a little). The Sigma can focus faster and I assume it's simply because the weight of the Pentax, means more mass to move and lock focus. My Sigma is the older model without the macro or HSM motor so similar to the current Tamron.

Buy the Pentax and try it out, if you don't like it, you will make money reselling on Ebay. Make sure the lens is in good shape because the finish on these will scratch very easily.

They came with a soft pouch in the box and hopefully this one has that because it's hard to find the correct pouch to protect it.

Last edited by Peter Zack; 02-21-2009 at 08:45 AM.
02-21-2009, 08:32 AM   #23
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It's only been used from planes, and the owner actually delivered it to pentax for "service". That means it's probably in very good shape. But I'm gonna pick it up myself, and therefore get the chance myself

02-21-2009, 08:46 AM   #24
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QuoteOriginally posted by Nimrad Quote
It's only been used from planes, and the owner actually delivered it to pentax for "service". That means it's probably in very good shape. But I'm gonna pick it up myself, and therefore get the chance myself
That sounds indeed like the perfect deal...
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02-21-2009, 10:05 AM   #25
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I too have recently looked at this lens as a possible replacement to the DA* 50-135mm. I was all set to buy the DA* 50-135mm when all of sudden the bad news started to surface - kinda like some sort of a warning.

The icing on the cake came just this past thursday when I was at a photography club meeting and a pentaxian explained to me that he was on his 3rd or 4th copy of this lens. I am not sure I want to go through that torcher of not knowing if the autofocus is going to fail you or not. So I have started to look for replacements.
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