All Forum Comments
Comment by pschlute posted on Mixing batteries in camera/grip at 28/05/2009 - 13:18
I would do some focus tests with your prime lenses first. My experience with auto focus is that every lens is slightly different. Many do not always achieve "perfect" focus first time. Some lenses will select a slightly different focus in consecutive tests. I use a split prism focus screen (as I manually focus a lot) so I know if the auto focus is correct or not. The smaller viewfinder on DSLRs make it difficult to evaluate focus yourself without one.
If after a number of tests you cannot get sharper images with the prime lens then I would suspect the lens is at fault and you should exchange it where you bought it.
Comment by pschlute posted on DAs Versus Kit at 28/05/2009 - 09:11
Comment by pschlute posted on Southend Festival of the Air 2009 at 27/05/2009 - 21:18
I wish there were more hours in the day
Comment by pschlute posted on Baby goldfinches are out at 27/05/2009 - 11:25
I am not an expert and others on this forum are far more knowlegeable on pp, but with regard to the USM you should use it as the last tool in your work. So after all your colour or levels/curves work has been done you should re-size, and only then use the USM to sharpen it up while viewing at 100%.
Here are some good tutorials that helped me :
http://www.cambridgeincolour.com/tutorials.htm
http://www.northlight-images.co.uk/tutorials.html
http://ronbigelow.com/articles/articles.htm
Comment by pschlute posted on Baby goldfinches are out at 27/05/2009 - 11:07
Comment by pschlute posted on New Lens and P Filter at 27/05/2009 - 08:46
Comment by pschlute posted on Another Street Portrait at 26/05/2009 - 23:18
Comment by pschlute posted on Today with a DA part 2 at 26/05/2009 - 11:29
Comment by pschlute posted on SD Card Compatibility at 26/05/2009 - 10:31


My existing two batteries are both Pentax original K10 products.
Any thoughts on me getting a non-genuine Pentax battery, and especially will it present a problem mixing them in the camera/grip combo ?