All Forum Comments
Comment by ChrisA posted on A bit more macro practice at 29/04/2007 - 10:06
As you may have noticed, I've been having a go at a little macro work. Some of you were kind enough to comment on my first efforts, at
http://i162.photobucket.com/albums/t244/chris5gd/Public/IMGP2806-1sc8.jpg
and
http://i162.photobucket.com/albums/t244/chris5gd/Public/IMGP3055-2s.jpg
Some one suggested that capturing things in their natural habitat gave a pleasing effect, so I had a go... all comments welcome.
K10D, fill in flash (built-in), 50mm SMC-A and 31mm tube.
http://i162.photobucket.com/albums/t244/chris5gd/Public/IMGP2806-1sc8.jpg
and
http://i162.photobucket.com/albums/t244/chris5gd/Public/IMGP3055-2s.jpg
Some one suggested that capturing things in their natural habitat gave a pleasing effect, so I had a go... all comments welcome.
K10D, fill in flash (built-in), 50mm SMC-A and 31mm tube.
Comment by ChrisA posted on A bit more macro practice at 29/04/2007 - 09:59
Quote:
agian, with your dslr, you will probably be forced to use a teleconverter to get that lens on the body.
Well, it's moot now, since I've purchased the 600mm Sigma that Chris@SRS mentioned a few posts back. It's a stop slower at F8, but 100mm longer.agian, with your dslr, you will probably be forced to use a teleconverter to get that lens on the body.
Watch this space for more full moon shots when I get a chance... I took these with a Sigma 400mm - it'll be interesting to compare the results...
http://i162.photobucket.com/albums/t244/chris5gd/Public/IMGP2385-1b.jpg
http://i162.photobucket.com/albums/t244/chris5gd/Public/MoonPretotality.jpg
Comment by ChrisA posted on Russian 500mm mirror lens at 28/04/2007 - 15:57
Quote:
It's all to do with the actual mount on the lens itself. On the Russian lens the M42 mount is a lot closer to rear of the lens - the Sigma has a longer space between the mount and the rear of the lens (if that makes sense!!)
Hmm. The eBay entry for this one says it's a K fit.It's all to do with the actual mount on the lens itself. On the Russian lens the M42 mount is a lot closer to rear of the lens - the Sigma has a longer space between the mount and the rear of the lens (if that makes sense!!)
But the mount does look pretty small in relation to the lens.
And if it is a 105mm filter fit, that's quite a bit bigger than the Sigma which is 86 or 87 IIRC (and F8 too, ISTR, so it wouldn't be surprising if this thing is F5.6 and so bigger.
Comment by ChrisA posted on Russian 500mm mirror lens at 28/04/2007 - 14:38
Quote:
I used to sell these - one thing to be careful of with this lens is the potential fouling of the camera prism/built in flash....
That's a good point.I used to sell these - one thing to be careful of with this lens is the potential fouling of the camera prism/built in flash....
I should have said that I'd use it on the K10D. Not bothered about the flash for obvious reasons, but would you be able to see through the viewfinder with it on?
I've used a Sigma 600mm mirror lens on the '10 and it was fine. Does this one have a larger diameter?
Comment by ChrisA posted on Russian 500mm mirror lens at 28/04/2007 - 13:39
Is this likely to be any good?
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=250106887257&a...
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=250106887257&a...
Comment by ChrisA posted on Russian 500mm mirror lens at 28/04/2007 - 12:49
Quote:
The real answer seems to be use A lenses or later, let the camera body select the aperture rather than the aperture ring and all will be well.
I don't know about 'real' answer. It's certainly the only answer that doesn't involve a lot of messing about. The real answer seems to be use A lenses or later, let the camera body select the aperture rather than the aperture ring and all will be well.
I've only got two pre-A lenses, SMC primes 135 F3.5 and 200mm F4. I guess I ought to think about selling them and putting the proceeds towards something newer. Shame though.
Comment by ChrisA posted on K10D Firmware Update 1.20 at 28/04/2007 - 12:13
On the subject of Stop Down Metering, I've run some more tests, much like the last lot, and come to the conclusion there's no significant change with firmware 1.2.
I've put some exposures at http://www.pentaxforums.com/forums/52128-post9.html if anyone's interested, but it's the same old story.
I've put some exposures at http://www.pentaxforums.com/forums/52128-post9.html if anyone's interested, but it's the same old story.
Comment by ChrisA posted on K10D Firmware Update 1.20 at 28/04/2007 - 11:10
Quote:
Brian is right
SDM = Super Direct-drive Motor (apparently)
Ah. Brian is right
SDM = Super Direct-drive Motor (apparently)
Bums, then.
Comment by ChrisA posted on K10D Firmware Update 1.20 at 27/04/2007 - 07:59
Quote:
Have been told that this firmware also gives full SDM support...
Well. If SDM stands for Stop Down Metering, then regrettably, after a couple of admittedly very crude tests, this is a definition of "full support" that I've not come across before.Have been told that this firmware also gives full SDM support...
But I haven't done a proper test - I'll have a better look tomorrow night.
Comment by ChrisA posted on K10D Firmware Update 1.20 at 26/04/2007 - 23:37
As above, but 52mm tube this time, since he was a lot smaller than the bee. More difficult, closer, especially since this one was running about.