Hi James - welcome to the forum.

You might get some luck with our friends at SRS. Their used dept has Pentax MF an AF sections.

Thanks for the replies.

I am using a K20. I tend to use the basic white balances as appropriate then make any adjustment as needed in pp.

As to the flashing thing - I hadn't thought of that. Actually they flash 100 times a second (one positive and one negative cycle at 50Hz). I have found this with optical rev counters. Given the exposure time of 1.3 seconds (60 odd cycles) I am surprised that the difference is so great. I'll have to find a tungsten bulb.

At the risk of being a geek and not getting invited to your Christmas party can you explain the physics behind that John?

They were all exposed on the "Tungsten" setting (the one I find best for low energy bulbs).

As I said - camera settings all the same.

The only differences I am aware of are that in 1 and 3, the light source was directly behind me and in 2, it was about 45degrees to me.

Best off Mate

The weather is awful and I've had a brutal week. I needed to take a few photos so I put the K20 on a (naff) tripod (no weights this time :wink and fired off a few with my DA* 16-50 and DFA 100. No adjustments to camera settings, little PP other than cropping and re-sizing.

1/. 16-50

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/16-50.jpg[/IMG]

2/. 100

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/100-2.jpg[/IMG]

3/. 100 again

[IMG]http://i217.photobucket.com/albums/cc222/Oggy3323/100-1.jpg[/IMG]


When I took the second picture I was amazed at the difference in tint/colour cast. I looked at the two for a while and worked out that the second picture was taken at a different angle relative to the light source (a 150 W eq low energy bulb) so I moved the camera to a similar position to the first picture and took the third.

Would people expect the angle of the light to make this much difference to the colour?

Remote assistant here for windows or here for mac.

I use IE7 for all other sites and FF for this one, reason being that it's dead easy to clobber the ads. Personally I have had very few problems with it.

Without being able to site any specific reason I find I seldom use my 60-250. My DA* 50-135 and 300 both take a better picture.