All Forum Comments
Comment by JohnX posted on K-X Software at 07/01/2013 - 15:33
Comment by JohnX posted on Pentax MX-1 Announced! at 07/01/2013 - 14:18
Hi John
http://www.amazon.co.uk/Triggertrap-Android-Version-Connecting-Powershot/dp/B008...=sr_1_1?ie=UTF8&qid=1357414565&sr=8-1
This is the one I bought.
cheers
Comment by JohnX posted on TriggerTrap iPhone App at 05/01/2013 - 23:10
Comment by JohnX posted on TriggerTrap iPhone App at 05/01/2013 - 19:17
I have statred re-using my ME Super (an hopefully will soon have a Spotmatic) so want to just get my films developed so I can scan them and then process my shots myself.
Comment by JohnX posted on Film Negative Scanner - Recommendations at 03/01/2013 - 09:01
Comment by JohnX posted on DA 17-70 - any tips? at 01/01/2013 - 19:01
Comment by JohnX posted on F stop / Aperture value? at 31/12/2012 - 14:49
link
Try also looking in the Gallery, plus over on Flickr, and also here link
Lastly, for the £100 trade-in deal SRS close at 4pm to-day, although I suppose you can order from them on-line until mid-night.
Comment by JohnX posted on A hello and a request for guidance at 31/12/2012 - 13:35
Take as an example an F-stop of f13. The corresponding "aperture value" will read 7.4.
Why? Av is formally defined as 2 x log(base2) of the aperture. So 2 x ln(13)/ln(2) is ~7.40.
Why log(base2)? Because each whole number increase represents a doubling, i.e. one stop.
Why multiply by 2? Because the amount of light let in by a given f-stop is proportional to the aperture's area rather than its diameter, so the aperture squared is the key variable.
A fuller explanation is here:
http://en.wikipedia.org/wiki/APEX_system
Comment by JohnX posted on F stop / Aperture value? at 30/12/2012 - 22:34
Comment by JohnX posted on K5 SD Card stuck. at 30/12/2012 - 14:50


The JPEG settings in-camera are adjusted to my preferance, but having the RAW available gives me a chance to play with/adjust/crop/etc any shots that my usual JPEG settings have not worked with.
Ok, you end up with fewer shots/gb on your memory card, but memory cards are cheap enough.
Your K-x will 'do' RAW+, so why not?