Thinking of switching to Pentax from Canon

Started Aug 6, 2013 | Discussions thread
fakuryu Senior Member • Posts: 1,333
Re: FF! FF everywhere!

ultimitsu wrote:

fakuryu wrote:

ultimitsu wrote:

fakuryu wrote:

ultimitsu wrote:

That is correct, but do you have any indoor shots w/ dim lighting?

1/5s F2.8 ISO1600,

Can't really say but even with such a small pic, PP and noise smoothing is already evident.

What are you on about buddy? this is 4000x3000 image, focus is on the steering wheel.

I don't know if something is wrong with your eyes or your monitor but there is a lot of smearing and it is really noisy... buddy.

for one thing it isnt even a real 70-200, it is a 70-180. in other words, it has no real 200mm end, so how can it beat Canon's 200mm end?

70-180? 200mm end? Or do you mean 68-196 for the Tamron (Tamron 70-200mm f/2.8 Di VC USD) and 68-193 from the Canon (Canon 70-200 f/2.8L IS II USM). Actually, it looks like that the Tamron has the longer end, better optically, just as fast, it may not be as well built as the L but it is substantially cheaper. Unfortunately, that model does not come in the K mount (hopefully just for now)

I am not sure where you got these numbers from. But you can have a look the link below.

"The Tamron 70-200 (really it’s 186mm) f/2.8 is also exceptionally sharp, and maintains its sharpness throughout the zoom range, even at the long end. Just be aware the long end is not 200mm. We have the Canon and Nikon lenses all measured right at 200mm, while the Tamron is about 186mm. For what it is worth, the Sigma 70-200 f/2.8 is about 190mm."

TO THE ADMIN: Just please delete the links if it is not allowed

Of these 5 links you gathered, 3 makes no mention of focal length, one of them is tamron's own site so it should be disqualified. You are wasting time.

pop photo is the only site mention actual FL, but they do not mention focus breathing at all while.

This is what has to say:

"Focal Length

The Tamron 70-200/2.8 VC USD exhibits what is sometimes referred to as “focal length breathing” or sometimes “focus breathing”. That means that the effective focal length (or angle of view, or magnification) changes with focus distance, specifically the closer the focus the shorter the focal length at any given zoom setting. This is somewhat difficult to measure, but at the a close focus distance of 2m I’d estimate that the “true” or “effective” focal length with the zoom set to 200mm is closer to 140mm. A lot of zoom lenses do this to a greater or lesser extent. At infinity I measured a focal length of 196mm, which is pretty typical for lenses which are nominally “200mm”, while at 10m I measured a focal length of 188mm."

That is in line with Lensrental's finding

Hard to say, since I have very little interest in wildlife or action photography. Maybe lets just wait and see from other users and

So you cannot really testify as to tamron's AF performance in terms of comnination of speed and accuracy as I have pointed out several posts back, can you?

Read down, I just posted a shot with the old 70-200 with a D40. Combination of speed ang accuracy? How about a badly lit runway shoot with an older camera (Tamron + D40) vs a somewhat newer camera and supposedly one of the best lens of Canon in good lighting?

So if one review site says one thing and one the other, either way, still sharper and has a better distortion control over the Canon 70-200 f/2.8L IS II USM while $1000 cheaper.

And please, if you are going to quote me, quote everything. This is already way out of topic. In no way or form a 60D has better lowlight low noise high ISO performance over a K30/K50/K500/K01.

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There is no such thing a "Pro" level gear, just Pro level work.

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