Search results for 'back focus' - page 820
16-45mm £229 or Tamron 17-50mm??
Looks much better now! It's a big improvement over the previous image, especially the trees against the skyline where the previous shot showed all the problems. Whether or not it is comparable quality to the 16-45 or 17-50 is another matter. Personally I don't think so, but without two near identica...
Posted by thoughton on 08/03/2010 - 16:44
Lens sharpness.
Having recently bought a DFA 100 2.8 macro I was immediately impressed with the results. They struck me as sharp. This evening I was experimenting and got rather a shock. I took a picture with the 100, then moved the tripod back and took a similar picture with my beloved DA* 300. Both shots were tak...
Posted by Oggy on 26/10/2009 - 21:22
Lens sharpness.
Have you checked accuracy of focus for both lenses? Maybe a static focus-check (and adjustment) might help. However, that's just a thought... I can't find much evidence of OOF in the 300mm shot, perhaps a combination of slight motion blur + slight OOF. I'd also need to go off and check DoF at...
Posted by MattMatic on 27/10/2009 - 15:45
SIGMA 50-500 EX DG
Many thanks jackitec for the link to your tripod looks like just the thing i'm after. Apologies for not taking you up on your Bigma offer your was very reasonable prices its just that this one is a bit more local to me and i've got the chance of a buy before you try deal on it, but if its not up to ...
Posted by elvisboy on 01/11/2009 - 09:07
SIGMA 50-500 EX DG
I have a sigma 170-500 at the moment Question is; would you use the shorter focal lengths and/or do you feel the quality of the 170-500 isn't up to scratch? The Bigma is supposed to be the better of the two optically but I suppose that comes from pixel peeping and tests. Why not post some images ...
Posted by Offertonhatter on 04/11/2009 - 20:47
SIGMA 50-500 EX DG
True Mike, however the Canon 100-400 got walloped by the 120-400 and 150-500 in the PP test. I have a could of friends with the 100-400, and although good, they say it is not the best. They always complain about the lack of decent long tele-zooms in Canons range. In fact one guy hired the 120-300 F2...
Posted by Mike-P on 05/11/2009 - 17:28
SIGMA 50-500 EX DG
This is personal and may be due to my lack of ability but I found that there was a steep and long learning curve with the Bigma. But in the end I managed bird shots of, I hope, similar quality of those already shown, I do still find it difficult in poor light but to be fair few lens perform to their...
Posted by Thordell on 05/11/2009 - 19:49
Lens focussing issues and SRS Microsystems are great
As some of you know I bought a DA* 16-50 a while back and found it was back focusing quite badly. SRS sent it back to Pentax twice and it made no difference on my K10D. I went to SRS in Watford yesterday to sort it out and they were very accommodating. They called Pentax who surprising agreed to ...
Posted by ericp on 28/10/2009 - 13:15
Lens focussing issues and SRS Microsystems are great
ON the K20D you can adjust for front/back focusing lenses. I don't know if you can on the K10 but have a look in the manual or menu on the camera and check. If you go and have a read and download the chart! It may help some. :)
Posted by Spad on 28/10/2009 - 13:36
Lens focussing issues and SRS Microsystems are great
I have read this before on another forum, people with K10D's that have had focusing problems with the 16-50mm find they all go away on the K-7. ON the K20D you can adjust for front/back focusing lenses. I don't know if you can on the K10 but have a look in the manual or menu on the camera and ...
Posted by Mike-P on 28/10/2009 - 13:37
Lens focussing issues and SRS Microsystems are great
I think there's a hacked firmware for the K10D which allows you to adjust back/front focusing issues. I believe it's a camera issue rather than a lens issue.
Posted by Mongoose on 28/10/2009 - 13:38
Lens focussing issues and SRS Microsystems are great
I've seen on the Internet a Windows application that enables Debug mode for the K10D via the USB connection (without changing the firmware) ;) Yes but it still affects EVERY lens on the K10D so you may get the 16-50mm focusing correctly but at the same time another lens will maybe go that much off...
Posted by Mike-P on 28/10/2009 - 14:30
Lens focussing issues and SRS Microsystems are great
I found that my K10D and GX-10 were both back focussing, and adjusted both using the 'Russian' software to get the camera into debug mode. Although the focus positions are not exactly the same for each lens, the results are close enough to be acceptable, and certainly better than the original setti...
Posted by El Dingo on 28/10/2009 - 18:52
Lens focussing issues and SRS Microsystems are great
I found that my K10D and GX-10 were both back focussing, and adjusted both using the 'Russian' software to get the camera into debug mode. Although the focus positions are not exactly the same for each lens, the results are close enough to be acceptable, and certainly better than the original setti...
Posted by GlynM on 28/10/2009 - 21:17
Lens focussing issues and SRS Microsystems are great
Here is an interesting questions. The K7 and K20 have individual AF adjustment for up to 20 lenses, great. What if, on the K7, some lenses are still not perfect even with the maximum adjustment you can do (+/- 10)? I have read somewhere that also the K7 has a debug mode, where the focus c...
Posted by nathanever82 on 29/10/2009 - 01:21
Lens focussing issues and SRS Microsystems are great
Yes John, I completely agree, which is why I have never done this. Problem is that every time I have sent equipment back to pentax for this type of small complicated very detailed (see anal - N.B. hope this is not too foul language) change in settings, they have always been completely useless. A...
Posted by nathanever82 on 29/10/2009 - 12:54
Lens focussing issues and SRS Microsystems are great
The problem with film cameras was that if left for a while the film would kink where it passed over the rollers, so the first frame or two would be out of critical focus. Things improved dramatically as camera design became more sophisticated and these problems were addressed by looking again at ...
Posted by johnriley on 29/10/2009 - 14:25
Lens focussing issues and SRS Microsystems are great
And knowing my luck, when I finally upgrade to the K4, it will have some new algorithm to handle the new Supersonic SDM (SSDM) available in the 10-300 f2.8 lens but it will be incompatible with my archaic 16-50 SDM and will most probably front focus! Funnily enough, if everything just worked I wo...
Posted by ericp on 29/10/2009 - 23:29
Lens focussing issues and SRS Microsystems are great
I found that my K10D and GX-10 were both back focussing, and adjusted both using the 'Russian' software to get the camera into debug mode. Although the focus positions are not exactly the same for each lens, the results are close enough to be acceptable, and certainly better than the original setti...
Posted by El Dingo on 30/10/2009 - 18:10
Pentax 50-200mm DA ED f4-5.6 Lens
Not overly happy with my 50-200, not very sharp (to say the least). Was thinking of getting the 55-300 (very sharp supposedly), but as I do a lot of walking I've decided to get the 18-250, good range but slightly less sharp. Telephoto lenses can often disappoint if higher shutter speeds are not empl...
Posted by johnriley on 29/10/2009 - 13:27
