Search results for 'back focus' - page 1177
Sigma 170-500mm APO for Pentax - Compatibility?
Hi - I have one of the above lenses for sale (elsewhere) and I'm trying to pin down what cameras it's compatible with. I was using it with an adaptor on a Lumix - so have no idea what bodies it's actually meant to fully work with - eg Auto-focus functionality. Can anyone please help me with this? ...
Posted by ludw1g on 21/06/2016 - 10:55
28mm Lens
Joe Re the Komine made Vivitar - have a look at http://photografica.robinparmar.com/vivitar.html which lists them all, because there are LOTS of version. Some of them are very good and others less so. I have the A03 version, which is the 28mm F2.8 MC Close Focus and is a KA mount. I think ...
Posted by swarf on 22/06/2016 - 18:03
28mm Lens
Some of the Vivitars are known to be quite good, especially if they're the close focus versions, but I would expect the Pentax to be better. It's a little slow but well built, compact and extremely sharp wide open.
Posted by Jonathan-Mac on 22/06/2016 - 21:06
28mm Lens
thanks for the responses . i did find out the Vivitar Close Focus was well regarded but not easy to find along with the K f2 plus would be quite expensive. the M28 f3.5 seems to be leading the pack at the moment as the few shortcomings reported, bokeh not brilliant and not sharp sharp at 3.5, are no...
Posted by redbusa99 on 22/06/2016 - 23:59
28mm Lens
I have all 3 28mm you mention, the M, the K and the Close Focus in m42 mount. On APS-C the M is as sharp as the K or should that be the K is as sharp as the M. The K apparently has sharper corners which you can't see on APS-C. I have yet to try it on full frame 35mm film. I am selling the C...
Posted by nocturnal on 23/06/2016 - 05:08
28mm Lens
The 'Vivitar' (Komine, I think) close focus is often found (on Ebay) as the Miranda 28mm macro - it's very good. Mine is in a K mount. The Takumar M42 28mm is excellent too but you need an adapter for it. Perhaps the best one is the Pentax 'A' series but they cost a bit more. Unless you are using a ...
Posted by davidwozhere on 24/06/2016 - 01:43
28mm Lens
thanks very much for all the information on these lenses, i will save it. have been offered an M28 f3.5 at a good price so will go with that for now. interesting that the Miranda macro is the same thing as the close focus Vivitar,
Posted by redbusa99 on 24/06/2016 - 10:33
Single focus lenses 2017
The 2016-7 roadmap shows four new single focus lenses in 2017, ultra wide-angle, large aperture wide angle, standard and medium telephoto, plus a fisheye zoom. Sound familiar? Replacements/updates for the venerable FA Limited range? I have been thinking of adding one or two but would it be worth hol...
Posted by RobL on 23/06/2016 - 20:34
Single focus lenses 2017
There's not a lot of detail on it yet so anyone's guess! If it helps anyone here's the link to it: http://www.ricoh-imaging.co.jp/japan/products/lens/images/K_Mount_D_FA_Lens_Roadmap.pdf
Posted by JAK on 23/06/2016 - 21:11
Single focus lenses 2017
I'd be most interested in a fairly wide prime lens, perhaps about 20mm.
Posted by johnriley on 23/06/2016 - 23:07
Single focus lenses 2017
I do not see the important "AW" or " WR" in the lens description. Time yet for clarification or To inform Ricoh of our thoughts. Regards.
Posted by theonenadeem on 24/06/2016 - 18:59
Single focus lenses 2017
I do not see the important "AW" or " WR" in the lens description. Time yet for clarification or To inform Ricoh of our thoughts. Regards. That's because it is a generic description, without aperture or focal length either. And the map doesn't include the latest compact zoom so maybe there wil...
Posted by RobL on 25/06/2016 - 07:59
Single focus lenses 2017
Going by the example of the 16-35 and 24-70, the wide angle / normal / medium telephoto lenses will probably be the Tamron 35mm f1.8, 45mm f1.8 and 85mm f1.8 respectively (given the same weather sealing and Pentax rebadging as the zooms).
Posted by MrCynical on 02/07/2016 - 00:13
Single focus lenses 2017
I'd be most interested in a fairly wide prime lens, perhaps about 20mm.[/quot[quote:3496ace15f="johnriley"]I'd be most interested in a fairly wide prime lens, perhaps about 20mm. I'd be most interested in a fairly wide prime lens, perhaps about 20mm. I am with you there John, I am looking for a wide...
Posted by RobL on 03/07/2016 - 17:48
M37 to k mount adapter
I'm sure they exist, and if properly engineered there's no need for any light leak. However, 37mm thread lenses are probably for rangefinder cameras and the back focus will be too short for a DSLR. This would mean no infinity focus, so close ups only. If lens elements were added into an adapter t...
Posted by johnriley on 25/06/2016 - 07:48
M37 to k mount adapter
I use an Asahiflex 50mm lens with the 37 to M42 adapter. The adapter is or was available on Ebay. The light leak is not the fault of the 37 mm adapter, There are 2 reasons, why the light leaks. 1.) the 42mm to K adapter has 2 slots on the side, to be able to remove it again. 2.)This doe...
Posted by Horst on 25/06/2016 - 09:48
Macro || Pentax K-50 + 50-200mm + (reversed) 18-55mm
If you are using a reversed lens, I'd suggest an old prime. The 18-55 won't work because of the aperture lever. A 50mm prime is pretty good, but for super macro (and a VERY close focus distance) a 35mm or 28mm prime is better. I would recommend picking up a second hand (e.g. charity shop) prime l...
Posted by MattMatic on 27/06/2016 - 11:17
Macro || Pentax K-50 + 50-200mm + (reversed) 18-55mm
The other UK Pentax group has a keen following of mounting a reversed EL Nikkor f/2.8 enlarging lens on a Pentax 35-80 zoom with all the glass taken out of it. I bought all the bits and pieces but have never got around to stripping out the glass in the zoom. Cheers, Kris. Indeed. Works very well...
Posted by darkskies on 27/06/2016 - 17:38
Macro || Pentax K-50 + 50-200mm + (reversed) 18-55mm
If you want to have a reversed lens on the end of some sort of extension AND control the aperture in the normal way from the camera, you need a Pentax 'A' series f1.7 50mm lens (£10 - £15 Ebay). Unscrew the vanity plate off the front to get at the front lens element and then remove it. Go to the bac...
Posted by davidwozhere on 28/06/2016 - 00:03
DA* 60-250 Modification for Full Frame
Well, I've gone and ordered my K-1 today with some specific work related use in mind, so I won't have too many lenses for it, nor will I be able to buy the new ones at their current prices, so trawling the web recently I came across mod for the DA* 60-250 which I have and would definitely be of in...
Posted by Unlocker on 30/06/2016 - 11:19
