All Forum Comments
Comment by johnriley posted on Weekly Competition #108 - Smoke at 01/08/2009 - 23:30
I like shooting stills and am not really interested in shooting video - I don't object to it being introduced but I already have a video camera that I never use.
We'll have to see what happens in the market place.
Comment by johnriley posted on Pentax marketing of the K-7 at 01/08/2009 - 18:40
Comment by johnriley posted on Der Spiegel at 01/08/2009 - 18:33
That's a few reasons! But one day, who knows?
Comment by johnriley posted on Der Spiegel at 01/08/2009 - 18:10
If you have an object that fills the frame, say a small ornament as an example, then if you use a 100mm lens you will need to be twice as far away as if you use a 50mm lens. The DOF will be the same in both cases. The magnification stays the same so the DOF is the same. What will change is the perspective.
It all interlinks beautifully, but it takes ages to grasp the complexities of it all.
Comment by johnriley posted on Help understanding technicalities of Macro lenses at 01/08/2009 - 12:19
The readily obtainable and easiest route would be to use a 50mm f1.7 or F2 lens with a 2x converter and the use a 100mm Macro lens at f4.
The spec of the converter/50mm option becomes effectively 100mm f4, so you can compare them directly.
The huge advantage of the converter is that the minimum focus distance stays the same as the prime lens, so in the example above the result focuses as close as a 100mm macro would.
The pedantic, please note this is "rounded off" but is close enough in a practical sense!
I've not done this for a long time, but intend to repeat the exercise soon, when the Pentax 2x converter I've just bought from eBay falls through my letter box. It should make for an interesting couple of hours.
Comment by johnriley posted on Help understanding technicalities of Macro lenses at 01/08/2009 - 11:01
Comment by johnriley posted on New member from Czech Republic at 01/08/2009 - 10:50
Comment by johnriley posted on UKoptics store - anyone used them? at 31/07/2009 - 20:46
Comment by johnriley posted on WTS 18-55 and 55-200 Samsung kit lenses at 31/07/2009 - 13:21
I used "Bright" when the winter was dull, but have now changed back to the normal setting to prevent results looking too garish.
Comment by johnriley posted on K200D JPEG Settings at 31/07/2009 - 13:18


That's so they can judge free of any influence our comments may have.
Equally well, the judge stays clear of this area until the judging is complete.