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11-11-2008, 08:50 PM   #1
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Pentax 55-300 vs sigma/tamron 70-200 f2.8

I have been reading Bryan Peterson's "understanding shutter speed" and i observed that Bryan seems to like shots using slower shutter speed and smaller apertures.

All his pictures are just breathtaking and most seem to be taken at around F8, F16 and F22 with long exposures such as 1/4sec, 10sec, etc.

I have always wanted to get a 70-200/f2.8 lens. Question I have is that if I use this 70-200/f2.8 lens at F8, 10 sec, will the picture quality be better than a cheaper pentax 55-300 at the same shutter speed and aperture?

11-11-2008, 09:14 PM   #2
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Doubtfull.
11-11-2008, 10:14 PM   #3
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You probably wouldn't be able to tell at those f-stops and shutterspeeds. I just got the Tamron 70-200mm and that was for the fast constant aperture to control the depth of field and lower light shooting capabilities.
11-11-2008, 10:20 PM   #4
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If you really aren't too worried about shootign at faster speeds in dark situations ... the 55-300 will probably do you though.

After reading a few different posts/reviews ... it was found that the 55-300 was close in resolution/image quality to the DA*300 when stopped down ... so when stopping down .. there may be negligible difference.

But if need to control DOF more for certain scenes .... and brightness ... the Tamron/Sigma variants will be able to get the shots the Pentax 55-300mm won't.

11-11-2008, 10:22 PM   #5
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I have the Tamron 70-200 and at those settings you probably won't see a difference.

The thing to consider is what other settings you're going to be using the lens in. I got the 2.8 for indoor shooting and for the DOF, so if that appeals to you I'd go for the Tamron.

The only downside that I've noticed is that the 2.8 is a huge lens and tends to get heavy after about an hour of handholding...but at 10 sec you'll probably be on a tripod.

Just my 2 cents,

-Yale
11-12-2008, 12:18 AM   #6
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Original Poster
Thanks for the explanations. Personally I would want to use the 70-200/f2.8 for fast action shots like an air race, motorGP, F1, etc. But looking at Bryan's example, he likes to pan at a lower shutter speed and a small aperture, so as to create some "moods" with the picture. With that in mind, it would prolly not justify the cost of the expensive 70-200 when a cheaper zoom can do the work.

But then again, I think he is not using any of the cheapo nikon zoom lenses either! I think his gear are all high end stuff. Makes me wonder. Maybe he has a Nikon sponsorship
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