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04-15-2014, 06:43 AM   #16
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QuoteOriginally posted by rrstuff Quote
The tokina RMC 80-200mm F3.5-4.5 is pretty excellent, from F5.0 onwards. Since it is only $25, this is what I would probably get over that over A 70-210mm.
A wise choice. I've got a Tokina AT-X F4 100-300 and recently it's been on my camera about 80% of the time! and I've got some great glass!

04-15-2014, 07:26 AM   #17
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QuoteOriginally posted by rrstuff Quote
The tokina RMC 80-200mm F3.5-4.5 is pretty excellent, from F5.0 onwards. Since it is only $25, this is what I would probably get over that over A 70-210mm.
I don't have that Tokina. But I consider my copy of the A 70-210mm great wide open at f/4. Maybe I am lucky and got a good copy? They can be had for about 60 dollars, so it's not like you'd get the Tokina because you can't afford the Pentax...
I'd love to have the Tokina 100-300 f/4 by the way.
04-15-2014, 11:00 AM   #18
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QuoteOriginally posted by ChristianRock Quote
I'd love to have the Tokina 100-300 f/4 by the way.
Everythings for sale for the right price
04-15-2014, 11:50 AM   #19
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Not quite as fast as you want, but a used DAL 55-300 goes for around $150. Mine does best at f8-f11, but between high ISO capability and shake reduction on my K-x or K-30, this lens does an outstanding job in low light.
Another lens for much cheaper I like is my Tokina SZ-X 80-200mm f4.5-5.6. Manual focus, but it focuses easily. It produces images very similar in sharpness to the 55-300 but with a bit less contrast. (There's also the manual focus bit and setting SR focal length fussing around, though.) I usually set it to f5.6 for best results, so that's a positive. Even better, this lens is astonishingly small. It's about the size of the 18-55 kit lens.

04-15-2014, 04:39 PM   #20
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QuoteOriginally posted by ChristianRock Quote
I have the Tamron 70-300 LD DI, so I guess it's the latest model.
Where do I find it inferior? Mostly rendering, micro contrast and contrast. I think the Pentax is just a bit sharper but it looks a lot sharper because the colors (on my copy) seem much truer to life, and the contrast is so much better.
But then I've seen people in forums saying that the A 70-210 is a nicer lens than the 55-300. I don't know, I've never had the 55-300, but the old A lens is, at least on my copies, a noticeably better lens compared to the Tamron. And the Tamron isn't a horrible lens, either. It's fine. But no more than fine. I keep it because sometimes I need the AF. The A 70-210, on the other hand, I consider very good.
Thanks for that reply. I do find the contrast somewhat better on the 55-300DA vs. the Tamron, so that may be a Pentax coating advantage, although it's surprising that Tamron wouldn't have caught up to coating that was that much older (as on the 70-210.) I do have the Canon FD 70-210 from the same era, which appears very similar in design and functionality (but w/o built-in hood) to the Pentax 70-210. I found it was a good lens for film. So far I've found the Tamron very similar after PP to the 55-300. Under some conditions (but certainly not all), the Tamron produces another pixel or so of color fringing than the Pentax, and I haven't learned out how to fix that yet (on either lens - even less-wide fringing isn't a good thing.) The standard de-fringing tools in the software I have definitely isn't getting the job done (for either lens.)
04-16-2014, 06:38 AM   #21
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QuoteOriginally posted by tibbitts Quote
Thanks for that reply. I do find the contrast somewhat better on the 55-300DA vs. the Tamron, so that may be a Pentax coating advantage, although it's surprising that Tamron wouldn't have caught up to coating that was that much older (as on the 70-210.) I do have the Canon FD 70-210 from the same era, which appears very similar in design and functionality (but w/o built-in hood) to the Pentax 70-210. I found it was a good lens for film. So far I've found the Tamron very similar after PP to the 55-300. Under some conditions (but certainly not all), the Tamron produces another pixel or so of color fringing than the Pentax, and I haven't learned out how to fix that yet (on either lens - even less-wide fringing isn't a good thing.) The standard de-fringing tools in the software I have definitely isn't getting the job done (for either lens.)
Contrast isn't only due to the coating... in fact it's probably not even the main factor... and don't discount SMC lenses from the 70s and 80s, that SMC was already very good back then. If you pick a K 28 3.5 and an M 28 2.8 you'll see that the contrast and the color rendering is pretty different even though the coating is very similar.

The Tamron isn't a bad lens by any means. It gives me quite a few keepers. When I am taking pictures of my kids sports teams, and they're moving, it's the Tamron that is on the camera. If I'm taking pictures of the batters where they're not moving much and I can pre-focus, I use the Pentax. I can always tell which lens took the pictures just by looking at the color and the contrast on the helmets!

One big advantage the Tamron has over the old A lens is that the focal length is transmitted to the body. So I find that hand held shots are sharp with lower shutter speeds than I use on the 70-210. The 55-300, of course, will have the same advantage.

Last edited by ChristianRock; 04-16-2014 at 06:43 AM.
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