Originally posted by ffking the pictures I get out of it are more pure Pentax than those I get out of the 24-70 - I prefer the rendition, not just the sharpness, and in an undefinable way - it just has that Pentax something that the 24-70 lacks (to me).
I agree. The 24-70 is at its roots a Tamron lens, the 70-200 is a Pentax lens, and with all due respect for Tamron, it shows. The 24-70 is an excellent workhorse with few flaws,. what it lacks is hard to measure but is real.
Originally posted by awscreo Is it not possible to just take dxo's pure numbers and ignore their opinion?
To some extend, yes. As long as you understand that they do not have a statistically valid sample. When I write a review, I'm careful to refer to "the tested lens". Any review on the web should be considered as
one sample in the statistical analysis (even, wink wink, mine
)
Originally posted by awscreo they have a massive database and an easy web interface to compare lenses, which makes them a good starting point to research a new lens.
The flaw in this is that their tests are dependent on the sensors, and as such, cannot be cross-referenced as much as they imply.
Originally posted by awscreo pentaxforum has more overall reviews (although a lot of them are user reviews, so not really scientific) for Pentax related gear.
Actually I think a large sample from several users is more statistically relevant than a small sample from an "expert". But the numbers are less useful than the comments.
Originally posted by awscreo I tend to take online opinions with a grain of salt
As you should.
Originally posted by awscreo I'm merely expressing skepticism that it out resolves the k-1s sensor, as far as I'm aware only few lenses managed to get to that point - Zeiss Otis and Sigma Art 85, both very recent, highly corrected, quite expensive (in Zeiss case very expensive) modern lenses. If 77s is secretly on the same sharpness level, then I will definitely look at buying one ASAP.
I don't have experience with those lenses. But as Nicolas06 writes below, it's a wrong assumption that the K-1's sensor has better resolvng power. Its pixels are larger so it can actually see less detail.
Originally posted by Nicolas06 What outresolve is supposed to mean? My FA77 closed down is really pixel sharp in the center on the K3 and the FF has less pixel density. All people compared FF and APSC for their wildlife need discover quite fast that FF is not that great for reach and magnification. Already wide open I don't see any lack of sharpness on a full screen, just a lack of contrast. I need to do 100% crop nit picking to see that it is somewhat soft and need f/2.5-f/2.8 to become extremely sharp.
Well put.
Originally posted by Nicolas06 Most lenses outresolve DSLR sensor, bet it APSC or FF, at least closed down in the center. But I mean a 40 year old 50mm prime would do it just as well.
Yep.
Originally posted by Nicolas06 And honestly as 8MP is more than enough for most uses on the final image, having more is for special use cases and having some margin for cropping/PP..
The way the lens render overall, it's color cast, it out of focus / in focus transitions etc on contrary are vislbe even on a 4x6" print or full screen on the computer.
Concentrating on getting more sharpness, in particular when you have lenses like the FA77 is a waste of time.
I completely agree with this.
Originally posted by D1N0 Some Pics from cp+
That thing is large! I'm surprised at the "DFA*" gold label on the side. The 70-200's label (as well as every other lens in the past) is different. I like consistency in design.
Originally posted by Nicolas06 The actual question is how usefull it is?
Resolution is useful for cropping.