Search results for 'back focus' - page 1055
Pentax A 28mm
It makes quiote a nice pair with the 50mm A, which I really enjoy using, when I can nail the focus! I'm lookign forward to gettign out and about with. As much as I like my Tamron and the versatility it offers it is sometimes a bit big and bulky when I just want to sling my camera over my shoulder...
Posted by rosstownsley on 07/08/2012 - 09:45
Pentax A 28mm
Sometimes the best approach is to reverse the norm - instead of going out with your lenses and seeing a scene or subject first, then fitting the lens, try fitting the lens first and then going out and finding the scene or subject for the lens (if that makes some kind of sense!) I mean, stick to o...
Posted by McGregNi on 07/08/2012 - 15:22
Pentax A 28mm
I just picked one up for pocket change. must say the focus action is superb for video shooting!
Posted by Don on 09/09/2012 - 14:01
Pentax DA 50mm F1.8
I have just got this lens, so far i am very pleased with it. The only other AF prime i have is the the 35. I will try and post some samples and pics tommorrow. Until then there are couple of pics in my gallery- both are taken with the lens. The lens seems very sharp, i think stopped down the d...
Posted by punkrockemo on 06/08/2012 - 23:43
Pentax DA 50mm F1.8
A shame about the QuickShift. Lenses project an image and without correction it would be spherical rather than flat. The consequence is that the centre could be in focus whilst the edges are out, or vice-versa. Lenses are corrected for this to make the image field flatter. Macro lenses are mor...
Posted by johnriley on 23/08/2012 - 10:48
Pentax DA 50mm F1.8
Very naughty of Pentax then, . I played with one briefly at SRS a couple weeks back, and a) noticed how similar to the DA35 it is (which definitely doesn't have QS), and b) didn't recall any QS, so I was surprised at JR saying it has it. Good for SRS, who have obviously noted this, and remove...
Posted by ChrisA on 23/08/2012 - 13:01
Pentax DA 50mm F1.8
Some lenses, such as the DA 55-300 (but not the optically identical, but less expensive DAL version), and the DA17-70, allow you to move the focus ring manually even when the camera is set to AF. This means you can adjust the focus after the AF has acted, or, more usefully IMO, you can manually m...
Posted by ChrisA on 23/08/2012 - 21:16
Pentax DA 50mm F1.8
Some lenses, such as the DA 55-300 (but not the optically identical, but less expensive DAL version), and the DA17-70, allow you to move the focus ring manually even when the camera is set to AF. This means you can adjust the focus after the AF has acted, or, more usefully IMO, you can manually m...
Posted by Smeggypants on 23/08/2012 - 23:57
Pentax DA 50mm F1.8
Some lenses, such as the DA 55-300 (but not the optically identical, but less expensive DAL version), and the DA17-70, allow you to move the focus ring manually even when the camera is set to AF. This means you can adjust the focus after the AF has acted, or, more usefully IMO, you can manually m...
Posted by DarrenHealy on 24/08/2012 - 05:47
Pentax DA 50mm F1.8
Lenses without QS won't let you move the focus ring without it rotating the whole screw drive, including the AF motor in the camera. This is a) much more difficult, and b) generally thought of as a practice not to be encouraged. They will if you've got a Pentax camera with a focussing select lever....
Posted by ChrisA on 24/08/2012 - 07:38
M42-PK adapters - some personal experiences
The M42 lens thread is a metric thread, 42 mm diameter with a non-standard 1 mm pitch. It was first used as a lens mount by Zeiss in 1949 - see . It was widely used by Pentacon, Praktica, Ricoh, etc as well as by Asahi Pentax. Many third party lens makers also marketed good lenses with what was, fo...
Posted by OldTaffy on 07/08/2012 - 11:51
M42-PK adapters - some personal experiences
Algi I suspect the Novoflex 42mm thread you had was a T2 thread which is 42mm with a 0.75mm pitch. It's quite common and can easily be confused with M42. As far as the tolerances for mount adapters, M42is an international standard, with known tolerances & as long as the K mount fits securely it...
Posted by petrochemist on 07/08/2012 - 12:54
Sigma 50mm f2.8 macro manual thoughts
Having just purchased an A28 f.28 I am fearful I have caught LBA... I have seen a Sigma 50mm macro (the old manual focus one by the looks of it) advertised and was wondering what experience any members had of it? I have had a look at the reviews on the American forum and it seems to score pret...
Posted by rosstownsley on 07/08/2012 - 19:36
Sigma 50mm f2.8 macro manual thoughts
For less than £50 it is an absolute steal if it is in reasonable condition and full working order. I had one for over a year and took a lot of macro shots with it (some in my Gallery Portfolio) and found it to be very sharp with nice colour rendering and lovely out of focus effects. I sold it on h...
Posted by davidstorm on 07/08/2012 - 23:15
Look what SRS have in stock
The two mainstays of FF are missing 28mm and 135mm..... They could bring back the K Mount Takumars if they still have the factory that made them :cry: 35mm was never very popular in the 135 film format anyway. It's unlikely that Pentax would bring out a camera and have lenses available :o...
Posted by Algernon on 09/08/2012 - 13:05
Look what SRS have in stock
I understand the new 50mm DA is full frame even though it isn't sold as such. I've still not seen the K5 taken off any Pentax sites including Japan. I am sure it is about to be replaced at Photokina for no other reason than Ricoh Pentax will want to badge their own stuff instead of stuffing a 'ne...
Posted by wvbarnes on 09/08/2012 - 13:30
Look what SRS have in stock
The two mainstays of FF are missing 28mm and 135mm..... They could bring back the K Mount Takumars if they still have the factory that made them :cry: 35mm was never very popular in the 135 film format anyway. It's unlikely that Pentax would bring out a camera and have lenses available :o...
Posted by robbiec on 09/08/2012 - 13:47
Look what SRS have in stock
Dunno really about the DA40, it will according to Falconeye's DA on FF thread on the American forum, vignette and have low quality corners from f/2.8 till f4-f/5.6 on a FF camera. I omitted it from my list based on Falconeye's published test results as losing a stop wide open is a non runner for me....
Posted by Pentaxophile on 16/08/2012 - 16:12
Lens mis-alignment potential on DA*
Hi Peter I have designed a lens test chart that may be some help testing you lens. It allows back and front focus checks (camera set at 45 degrees to chart) as is usual, but designed to be less mathematical and more visual than most. Used square on the camera, it will allow you to check edg...
Posted by jimmoore on 17/08/2012 - 11:07
Thinking the Unthinkable???
No not leaving Pentax but I really miss my Limited Primes! (snip) Any wise owls out there to show me the error in my ways here? WE, the wife and I, seem to be drifting, slowly, slowly, away from the Pentaxes. We've sold off a few lenses (DA50-135, FA31 & FA43) and one of the K-5s, and invested...
Posted by Tord on 16/08/2012 - 22:03
