Tamron f2.8. mf 90mm lens
Posted 27/12/2009 - 19:48
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With a PK/A mount you set the aperture on camera to say f13 .. you have a clear bright image through the viewfinder .. you focus and shoot .. no problem. WIth a K mount you open the aperture ring wide open, meter using the green button, adjust using the wheel if needed, close aperture on the lens to f13 and then shoot. Baring in mind macro needs a precise area of focus and absolutely no movement which would be easier (especially handheld).
No one is saying its impossible with the k mount, just that it's a damned site easier with a PK/A mount.
Unless I have been doing it wrong all this time .. which is possible I suppose.
No one is saying its impossible with the k mount, just that it's a damned site easier with a PK/A mount.
Unless I have been doing it wrong all this time .. which is possible I suppose.
Posted 27/12/2009 - 19:51
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Well, this thread got me wondering so I went off and looked up some Adaptall 2 PK mount photos. Genuine ones do have the aperture linkage! After-market ones (like this one) don't.
In my defence I got a PKA adapter quite quickly after getting the third party PK adapter. Now I only use the after-market PK adapter on a 500mm mirror (with a fixed aperture).
In my defence I got a PKA adapter quite quickly after getting the third party PK adapter. Now I only use the after-market PK adapter on a 500mm mirror (with a fixed aperture).
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
Stuff - Metz 58 AF1, Cactus v4, Nikon SB24, Raynox 150, Sigma 1.4x TC, Sigma 2x TC, Kenko 2x macro TC, Redsnapper 283 tripod, iMac 27”, Macbook Pro 17”, iPad, iPhone 3G
Flickr • Fluidr • PPG • Street • Portfolio site
Feel free to edit any of my posted photos! If I post a photo for critique, I want brutal honesty. If you don't like it, please say so and tell me why!
Posted 27/12/2009 - 19:58
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I think you might have been doing it wrong, Mike! If the adapter has the auto linkage, setting the aperture to f/13 will not close the lens down so you can focus wide open. When you press the green button it will stop down for a moment to meter (usually wrongly ), and then will stop down when you take the photo provided, of course, you have "permitted aperture ring".
Having said all that, it is CONSIDERABLY easier to use the A setting on a PK/A mount. We are all agreed there!
Best wishes, Kris.
Having said all that, it is CONSIDERABLY easier to use the A setting on a PK/A mount. We are all agreed there!
Best wishes, Kris.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
Posted 27/12/2009 - 20:00
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Mike-P wrote:
That could explain our collective confusion!
thoughton wrote:
Well, this thread got me wondering so I went off and looked up some Adaptall 2 PK mount photos. Genuine ones do have the aperture linkage! After-market ones (like this one) don't.
Thats like the PK one I have.Well, this thread got me wondering so I went off and looked up some Adaptall 2 PK mount photos. Genuine ones do have the aperture linkage! After-market ones (like this one) don't.
Kris Lockyear
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.
Posted 27/12/2009 - 20:10
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Quote:
:Having said all that, it is CONSIDERABLY easier to use the A setting on a PK/A mount. We are all agreed there!
Best wishes, Kris.
Not if you shoot in manual mode, just set the apeture press the green button.:Having said all that, it is CONSIDERABLY easier to use the A setting on a PK/A mount. We are all agreed there!
Best wishes, Kris.
John
Posted 27/12/2009 - 23:17
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Well, just tried out my 35-70 adaptall plus Tamron adaptall 2x converter and genuine mount (with aperture switching) and it operates just the same as a K or M pentax lens. Use on manual and green switch to set shutter speed for given aperture. Optical preview works, providing of course your eyes have been modded for night vision!
Just shot some Xmas tree decorations with the 540 flash (annoying the hell out of the missus, who is watching some cr*ppy American film). Found out that wireless and P-TTL are no-good, but setting flash to manual and playing with flash output/aperture/ISO I could get a good exposure very quickly, even bouncing off the ceiling.
Time for bed, I think!
Tony
Just shot some Xmas tree decorations with the 540 flash (annoying the hell out of the missus, who is watching some cr*ppy American film). Found out that wireless and P-TTL are no-good, but setting flash to manual and playing with flash output/aperture/ISO I could get a good exposure very quickly, even bouncing off the ceiling.
Time for bed, I think!
Tony
Posted 29/12/2009 - 10:17
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I can recommend buying the K adapter and do a little "operation" on your camera ( 100% reversible ).
Read this thread http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/63878-how-convert-...
I can assure it works! Tested with Tamron 90 2.5 macro.
I hope the "crazy" prices for a KA adapter may have a stop with this trick.
( as always, sorry for my English )
Giuliano
Read this thread http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/63878-how-convert-...
I can assure it works! Tested with Tamron 90 2.5 macro.
I hope the "crazy" prices for a KA adapter may have a stop with this trick.
( as always, sorry for my English )
Giuliano
Posted 29/12/2009 - 11:34
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Thanks but I have just bought a PKA adaptor with 6 months warranty as the total setup incl lens at(£170) still works out at half the price of a new tamron sp90 and i can use it on other adaptall 2 lenses
K7D DA 18-55 mk11WR|50-200 wr|DA16-45|Tamron SP90|lots of manual pentax glass
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7658 posts
17 years
Hertfordshire,
mostly.
Confused!
K.
It is an illusion that photos are made with the camera… they are made with the eye, heart and head. Henri Cartier-Bresson
Lots of film bodies, a couple of digital ones, too many lenses (mainly older glass) and a Horseman LE 5x4.