Does this adapter also function like a 1.4 X 'teleconverter' so that a Pentax 50 mm lens then becomes the equivalent of a 70mm lens, etc. ??
270681
This adapter has a removeable '1.4X teleconverter (infinity adapting) supplemental lens' insert. When I use the adapter WITHOUT it's supplemental lens on my D5100, I need to calculate the camera's compressed sensor value for a full frame lens! IE.: 50mm fullframe lens to my camera's compressed sensor, with the adapter's supplemental lens NOT IN place, is (50mm x 1.5 = 75mm) ~~~infinity focus is weak When I use the adapter WITH it's supplemental lens on my D5100, I need to calculate the camera's compressed sensor value for the full frame lens! IE.: 50mm fullframe lens to my camera's compressed sensor, with the adapter's supplemental lens IN place, is (50mm x 1.4 = 70mm) ~~~infinity focus is strong
270682
Agreed with DAVESURFPHOTO, this is an adapter that makes a PK mount lens fit on a Nikon camera.
270683
eh no not really just a lens adapter the crop factor of your camera and the lens your putting on it iam assuming a 50 mm = the 70 mm iam assuming your using a camera witha 1.6crop.....
913377
I read somewhere it does NOT work. I would not recommend this combination anyway für quality reasons. It is a bad idea to use a converter for a wide-to.tele-zoom. Teleconverters are best for fast lenses (2.0...4.0) and longer focal lenghts (fixed or fast pro telezooms).
1824786
Yes it will. Keep in mind that the teleconverter will slow down the lens by 2 stops.
97816
It's to adapt pentax K type to Canon EOS. Although it works, it doesn't hold the pentak lens snugly. There is some play in it so unless you are shooting on a tripod you risk the lens moving enough to blur your images
305440
You buy the mount separate from the lens, so you buy a pentax mount. It should work as all pentax have the same mount.
63408
Nate... I've used it with my Nikon 14mm, an 18 &gt; 35, the 24 &gt; 70, and a 70 &gt; 300. As well as with various old Prime lenses that I have repurchased: such as an 18mm, 24mm, a 28mm, a55 Micro, a 105 Micro, and a 180mm. It is the only adapter that seems to work for me with both an NEX7, a Fuji XE1 and a Video NSX 700. I have not been disappointed. HOWEVER - one caveat as I discovered fro myself - having purchased the $260 Novoflex (which DIDN'T work sharply at all on any of these lens/camera combinations)... And that is that it MIGHT appear that some converters work better than others with certain Lens &lt;&gt; Camera brand combinations. Conclusion: buy from somewhere that you can return it if - after careful testing - you find it isn't sharp enough for your needs. Good luck.
843342
Very sorry, but I have no experience in the use of the 1,4 teleconverter with 150-500 mm. Be aware that at more than f. 8 the autofocus does not work.....so if the maximum opening is f. 5,6 (but I did not check) you can use the teleconverter only with the complete opened diaphragm of the lens.
923632
This product is an adapter that filts on the outside of the lens attaching to the lens just like a filter via the filter screw mount. It has a 62mm screw mount size which means it will fit on any lens that takes 62mm filters. I use mine on a Sony 18-200mm zoom which has a 62mm filter mount. The combination gives me a equivilent 60-660mm telephoto. It doesn't provide great quality (it isn't a $15000 Canon) but for a reasonable price it does let you play around with super zoom shots. This type of lens attachment works best when shooting in B&W. If you want to see some examples let me know.
1089653
Hello,My apologies but I am not exactly clear on what you are asking. The adapter does not have any electronics contacts, therefore I do not believe the scale focus will work on the camera. However the lens distance scale should still be accurate. I just put a call in to our rep, he will be putting a call into tech support to see if they have a better answer for you. Please let me know if you need further clarification. Regards,RoozbehOC camera
346189
Yes the Pentax lens did work on my Canon camera with the adaptor. I was a little worried at first when i couldn't get it off of the camera but then i finally figured out there is a little metal strip that pushed in released it from the camera. Had me worried at first, and your Pentax lens will all be manuel.
741158
Hello - I bought this adapter thinking it would fit those lenses - and it didn't. I have both the 50mm f/1.8 and the 28 mm f/2.8 - both didn't fit b/c there's a metal stub at the bottom that does not allow it to mount on the adapter. The only lens I had that fit was the 75-150mm lens.I wouldn't buy it.
1558382
Sorry this was about a Tamron AF 2X Teleconverter, not Tamron lens. This teleconverter did not work on my Nikon D7000.
1641140
If a lens works on a previous analog or digital Pentax (K-mount), it will also work on the K-3. With adapters, you can use even screw-mount lenses and other formats and manufacturers lenses too. Some restrictions regarding manual apertures apply, but the camera still works with them perfectly. As your lenses are digital ones, you'll have no problem at all.
1468276
yes - exactly the same except, for example, the X shows XIF data as an aperture of 4.0 instead of 2.8 which is the actual lens f stop loss of a 1.4 teleconverter. The X wasn't out when I bought mine but I'm not sure I would have cared anyway. Take care.
244612
Im confused...so will the adapter ring allow me to attach actual camera lenses, for example, a fisheye or a 52 mm lens etc etc???
23200
Same answer here... all 3 of my lens from my ME Super work. Pentax will tell you exactly which lens function and their level of funtionality.
570267
This is an excellent teleconverter, I can make very good to excellent 11x 14 + prints without a problem. It will not with your lens, it works with the lens for a full frame camera.