Pentax K-1's AF

Started Jul 5, 2016 | Discussions thread
Barry Pearson
Barry Pearson Veteran Member • Posts: 8,723
Re: Pentax K-1's AF
9

Rishi Sanyal wrote:

MightyMike wrote:

....

.... There isn't a single consecutive sequence of shots in any of those links.

The airplane shots are all at infinity, requiring no refocusing whatsoever. An a7R II with an adapted lens will even perform that well.

The bird shots are one subject against an infinite background. That's what DSLR phase-detect systems were born to do. If you have a readout of a bunch of phase-detect sensors saying 'infinity!' and then one collection saying '30m!', it shouldn't be very hard for you to figure out which points to use.

Most of these shots could be taken with a Canon Rebel from the perspective of AF.

The problem is: we have an entirely different bar from you and many other readers, because we are handling every AF system from every manufacturer every day.

Here is a burst I posted in this thread a few hours ago to illustrate exactly these points. It is a consecutive sequence of shots, starting with a racing car in the distance, which in the period of between 2 and 3 seconds becomes large in the frame.

http://www.dpreview.com/forums/post/58014853

I could post lots more sequences like that, because I just found a shoot where I haven't yet deleted all the unwanted (but sharp!) frames. Normally by now there would only be the final one of the burst, and nothing else to post here.

This sort of burst is routine for me at airshows and motorsports with the K-1. I'm going to 3 major airshows in the next couple of weeks, and I will have lots more.

But this isn't new for Pentax. The K-1 is better than (say) the K-3-series, but here are a couple of full sequences I posted on the day my D FA 150-450mm lens arrived 14 months ago, taken with the K-3. Note the consecutive numbers in the Lightroom screen shots and no cropping. No time practicing how to use a lens unlike what I had been using before. Just take it out of the box, stick it on a camera which I hadn't carefully set up for it, go out into the street, and start shooting.

http://www.dpreview.com/forums/post/55776703

http://www.dpreview.com/forums/post/55776824

I don't know why there is such a difference between what I get and what reviews say. Perhaps part of it may be that I shoot in a simple way: point the camera at the subject, press the button, hold it down while following the subject, stop when I have enough. It works!

My feeling is that reviews may be judging a camera's AF not by what a typical photographer would get, but by how it compares with features used by specialist photographers.

If so, that means reviews are not describing the experience of normal photographers. They are not saying "if you are a normal photographer, you will get results like this, but if you are a spoecialist photographer you will struggle".  They just leave in the bit for specialist photographers, who are probably just a tiny percent of the target market for that camera. (I'm not naive - I know Pentax cameras are not in the 1Dx and D5 league).

Consider: had I relied on reviews, I might not have bought the K-3-series or the K-1. How many others did rely on reviews, and denied themselves the opportunity to get the sort of bursts I've shown above? But the harsh truth for this thread is that I have learned not to rely on reviews, yet I am clearly in the target market for cameras such as this!

 Barry Pearson's gear list:Barry Pearson's gear list
Ricoh WG-6 Panasonic LX100 Ricoh GR III Pentax K-7 Pentax K-3 II +27 more
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