Originally posted by Mo Seriously, why would you go complaining so much instead of actually using the camera and shooting some photos?
Mo, seriously, why when there are many responders who are accusing that I am being "complaining" would really make even YOU are thinking me of "complaining"?
DO read my opening post and my linked blog post, where and when I have a "complaint" on the K10D or any other Pentax DSLRs?
The message contained in this post and my new blog entry is merely an investigation into the case, by quoting, summing up but not discussing the Imaging Resource results, which can be more objective and factual somehow, unlike personal "feelings".
I do intentionally leave it *open* and emphasize that I share the information and "judge yourself". But unfortunately, I'm still being accused of "always complaining"!(?)
Frankly, I'm somehow upset, just because it's YOU. For other average Joes, I can understand!
Quote: One shoud do a few more tests to guarantee decent accuracy here:
-Response time with no lens (watch the dust!)
-Response time with a MF lens
-Response time with an AF lens using MF mode on the camera
-Response time with an [IF], fast-focusing AF lens such as the FA 85/1.4. (in both AF.C and AF.S)
-Response time with any other AF lens (in both AF.C and AF.S)
And then compare the results... Remember, no measurement is 100% accurate, and what if the K10D's halfway/AF button needs to be pressed farther down than that of the K100D? Wouldn't that throw everything off?
Their tests represent *most* of the *practical* shooting cases. Of course, it's not exhaustive. E.g., I did the AF and system time lag test with "one-go" for my K100D, i.e., to press the shutter release button until the shutter fires and measures both timings. Of course, the AF speeds is meaningful to compare with the same lens and I fixed the object distance plus the starting point of the lens, on different bodies:-
RiceHigh's Pentax K100D Full Review
As for the possible errors incurred by the testing methodology, I don't know exactly as I am not the one who carried out the tests.
But I just wish to amend that I had checked against those figures with the authorative Japanese CAPA published test reports and found that both are agreeing in general sense (just before I wrote my new blog article). The CAPA author who writes the review is a famous one who is also one of the main editors of DC Watch Impress (
ƒfƒWƒJƒWatch Title Page). I don't know his name in English though.
The CAPA report says that the time lag of the EOS 5D is 78ms, which is exactly the same figure measured by the IR. They measured the timing with a light detection setup for measuring when the flash of the DSLR is triggered (which means that the first shutter curtain has just been up for starting the exposure, the author says). And, most importantly, the starting trigger is electrically connect to the cable switch, so the error cause you've suspected about the release button is non-existent and the testing method by CAPA is very accurate at least, as I can see.
Whilst the IR's lab setup has not been disclosed, I think it should be very similar and both are to be accurate enough (IR claims that to be of "the resolution of 0.001 second). For other figures of the 30D, 400D, D80 etc. are indeed very close enough, although not exactly matched (the errors are within just a few milliseconds). The CAPA measured only one figure for the time lag, though, i.e. the true system time lag with prefocused. However, they also measured the viewfinder blackout time, which is valuable, I think.
Quote: From my practical experience, here's the response time tree: K10D>K100D=DS>D
So, again, it is back to "feeling". But then even we have to compare the figures, your above practical experience is valid, but only for the "Prefocused" shutter lag timing, only.