All Forum Comments
Comment by ChrisA posted on Dioptre adjustment and manual focus at 11/07/2008 - 00:22
I'm lucky enough to have good uncorrected eyesight, and looking through the viewfinder, everything in focus has always looked good and sharp. However, I was idly playing about with the camera just now, as one does, and it happens to have a MF lens on the front of it. I noticed that although the viewfinder image was sharp, my eye didn't feel as relaxed as it might (it felt as if it was working to focus, as it were), so it occurred to me that I might have accidentally moved the dioptre adjustment.
So I adjusted it, and sure enough, I could then see the viewfinder image sharp, with my eye relaxed - focused wherever it does when relaxed.
Now, all this isn't very interesting so far - the number of people wandering around with wrongly adjusted viewfinders must be legion, and I was just one of them.
However, what I then noticed, was that I can now focus manually, and get focus confirmation much, much quicker than before.
Before, it was "turn the ring, looks sharp, no confirmation, turn it backwards and forwards, eventually get confirmation, recheck image, yes, still looks sharp". It always annoyed me, but I put it down to the lack of old-style split-prism focusing.
Now it's "turn the ring, looks sharp, focus confirmation comes up". No messing.
So, why?
I reckon that while my dioptre was set wrong, it wasn't wrong enough to stop my eye being able to focus on the viewfinder image.
So with an AF lens on the front, it would focus, and I would then see the image sharp. I'd only have to look at it for a moment, and then I'd take the picture. So I wouldn't notice the effort my eye was having to go to.
With a MF lens on the front, though, it starts off not sharp, and my eye would be try to focus... meanwhile, I'd be turning the focus ring, and that would change what my eye was trying to focus on. This iteration would eventually stop when the lens and my eye were both correctly focused. But it took an annoyingly long time.
Presumably with the dioptre adjusted right, the effort required by my eye is less, so the iteration is much quicker.
It's certainly a dramatic improvement.
I'd be interested if anyone else finds a similar improvement, if they discover that their dioptre is set wrong - not by much, but enough to require the eye to work a bit, to get its own AF lock .
Comment by ChrisA posted on Dioptre adjustment and manual focus at 10/07/2008 - 11:32
In which case, just use the camera. It can convert Raw - Jpeg by itself!
I've never done it myself, but from the manual it appears that RAW-JPG conversion in-the-camera can be done only one frame at a time, unless I've read it wrong.
I can imagine this might be a bit of a faff, if there are a number of them.
Comment by ChrisA posted on Image File Conversion at 05/07/2008 - 23:42
Must admit, don't think I get this.
It lets you take a .DNG from a .JPG? That won't produce a better quality file, as you have already lost the detail by shooting in JPEG instead of RAW.
I agree with you, though - I use RAW+ much more often than I ever expected to.
If he really doesn't want to go to bigger SD cards, but wants to save space, then I'd suggest continuing to shoot mostly in JPG, but use PEF (significantly smaller than DNG) for the occasional RAW shot.
Then use Picasa to convert the PEFs to JPG - it's also free, very easy to use, and lets you do some basic editing too.
Comment by ChrisA posted on Image File Conversion at 05/07/2008 - 18:27
Comment by ChrisA posted on Discussion:Weekly competition # 52: ''The Ugly" at 03/07/2008 - 16:21
The offensive language has been removed.
It has also changed the entire sense of the exchange, which is still left for all to see.
By moderating thus, you are effectively saying that the language used earlier (which was very offensive to me), is acceptable on this forum, whereas my reporting it is not.
This seems very partisan to me.
I'm not sure quite how to respond further. Perhaps you would.
Comment by ChrisA posted on Discussion:Weekly competition # 52: ''The Ugly" at 03/07/2008 - 16:09
You waded in rather heavily, while the competition is still in progress. You could have been more diplomatic, and you could have waited 'til after the judging.
Comment by ChrisA posted on Discussion:Weekly competition # 52: ''The Ugly" at 03/07/2008 - 09:34
two words; the second one is 'off'
Since when was it acceptable for posters to snipe before the judge has made a decision. I'll find out where you live and... fill the rest in yourself
I have offered an example of why I hold an opinion I've expressed before, regarding captions for competition photographs.
If you feel that my comment is likely to unreasonably bias the competition judge against your entry, then I unreservedly apologise, and withdraw my reference to the composition of your photograph.
My opinion of captions, however, stands, and until a moderator objects to my expressing it, I won't be intimidated from expressing it by veiled threats.
Comment by ChrisA posted on Discussion:Weekly competition # 52: ''The Ugly" at 02/07/2008 - 23:22
The ugliness of religious bigotry
The caption betrays a very subjective objection to whatever bigotry that guy is apparently guilty of (I have no idea, myself, what it's about, and the caption makes it no clearer to me).
Without the caption, and the background knowledge that makes sense of the context, this is just another snap of some bloke with the top of his head chopped off.
Personally, I think captions should be against the rules, and the photos should be judged on their own, in the context of the competition theme.
Comment by ChrisA posted on Discussion:Weekly competition # 52: ''The Ugly" at 02/07/2008 - 22:30
But sadly the picture link is broken. I had a poke about in his Picasa gallery and I think it must have been one of the Burnham Beeches collection, but there are a lot in there and I don't remember it well enough to know which one.
I commented on its naturalness at the time.
To me the sky looks a little too vivid, and the ground looks a little lacking in contrast,
but it's a nice photo never-the-less.
Comment by ChrisA posted on A Local Event at 04/07/2008 - 13:08


I would think that everybody would benefit from correct diopter adjustment.
My situation was that I thought that my VF was already adjusted correctly - because everything was perfectly sharp when the image was in focus.
I'd just encourage people to check - since for me at least, a small adjustment has had a very welcome and unexpected side effect.