I had 3 copies of this lens and all had af issues. I fine tuned it for the long end, 200mm. I extensively tested it on a K5 by taking hundreds of shots before returning it for a replacement, eventually givng up. I would say that shots of over 30m way were generaly good, but any closer not so and would occasionally miss focus. At very close range ie pseudo macro all were oof

However I now feel I should have hung onto one copy as the image quality at distant shots were very good and it was at a very good price.

regards

Jeff

I had the the mirror flap issue a few months ago but nothing since. Also I have done 2 firmware updates since it happened.

Vic.. It's not new, the K5II had 1 of these af points, the K3 has 3. You can find details on the Ricoh Pentax website.

Question is are these f2.8 af points as good, better or the same as the standard af points when a slower lens is on.

Jeff

Presumably the 3 new f2.8 af spot sensors are designed to give a more accurate and/or faster autofocus when using fast lenses. 99% of the time I use spot focusing and was wondering if the 3 f2.8 spots are best for fast lenses then are they also best for slower lenses or are the other ones better for slower lenses, or is there no difference.

Jeff

The SAFOX 11 AF module with 27 auto focus points with 3 at f2.8




Regards

Jeff

Now the K3 has three af points which are designed to detect the light flux of an F2.8 lens. So if using an f2.8 or larger aperture lens I take it these are the best af points to use, but is it better to use these or the other af points for say f4 or f5.6 lens?

Any ideas?

Jeff

you can check the trigger voltage by swichting ilt on and measuring between the centre contact and the metal contact on the side of the hot shoe. There is also a website that tells you the compatibilty, but you would have search for it.

Regards

Jeff

in my experience on the K5 SR isn't perceptable. I had a Kr before and that was noticable.

There are no new Pro accounts but people who had them were still able to keep them.

I have looked at Flickr FAX and found that those with Pro accounts should have their file size limitation upgraded to those of free account users. So it could be a bug. I am going to report it to Flickr in any case.

I uploaded a very large image to Flickr, a panorama(40797 x 3796). It uploaded ok from Lightroom but a while later later I tried to view it full size and it would not do it.

I have checked the file upload limitation and it seemed to be 200MB. However I have looked at their forum page and it appears Pro account users are restricted to 50MB.

Pro account users are worse off then free account users.



Jeff