The backpack is a real space miracle for its size. My Nikon D300 including Tamron 17-50 mm f2.8 + Tamron 70-200mm f2.8 + Tamron 90mm f2.8 and a Nikkor 35mm f1.8 fit easily. and there is still room for a water bottle (e.g. O²) and the additional laptop compartment is also great. a 13" fits in easily. unfortunately without a fabric cover. but good.

I bought an adapter to connect an old Tamron SP (31A) 200-500mm F5.6 to the Panasonica body. Everything worked, there is no feedback between the lens and between the body and the adapter. Despite the considerable weight of the body and lens, everything remains solid. I haven't noticed any issues with grind or punch through lights. I am very pleased.

Summary: My experience is consistent with the positive experience of other reviewers. Purpose of purchase: The K&F Concept Adapter was purchased to use my Nikon & Tamron full-frame lenses (primarily the Nikon 50s and the Tamron 90s macro) on my Olympus OM-D E-M5 (MK 1). Result of the first short test (approx. 20 minutes): The adapter fits 100% precisely and has no play, the aperture grid runs very smoothly (6 audible grids) and covers all aperture values of the lenses I tested, which means the adapter is in the Ability to fully open and fully close the aperture (tested with Nikon G 50/1.4 and Tamron 90 SP VC Macro (F2.8 to F32)). The surface finish is also of high quality (much higher than the price suggests) - one possibility for optimization would be the continuous matting of the inside of the adapter to prevent light reflections. But that's whining at an absolutely high level and not feasible at the price. Such an optimization can also be done later - just search for "dead matt black optical color" there are tips from telescope construction (at your own risk!!). The test was carried out at close range (apartment), ie the infinity setting has not yet been tested - but based on the reports of other reviewers, this should not be a problem. A positive surprise for the "hammer price" (the 2nd this year for a Chinese product) - there are still quite high-quality and inexpensive products on the photo market. I'm curious how the adapter performs in the long-term test - the critical point here would only be a defect in the lens lock, since the adapted lens could then no longer be removed from the adapter.... I certainly wouldn't have afforded the alternative Novoflex adapter because of the use of the "heavy" full-frame lenses on the M5 only makes limited sense due to the weight distribution (the 90s Tamron on the M5 became quite unwieldy without a handle because it was top-heavy) and the M5 due to the lack of focus peaking (I know the "helpful solution") for the use of manual lenses is also only suboptimally equipped. This is not intended to be a criticism of the Novoflex adapter, which is probably even better processed and offers further advantages (e.g. the use of an additional adapter (approx. 100 EUR) to relieve the camera bayonet) but costs 10 times the price and that's it for me then not worth it in my usage scenario. A big thank you also to the other reviewers as very helpful for the product selection. ...and no, I'm not a "bought" reviewer and I'm also pretty "old school" - ie quite demanding and critical when it comes to the general quality of photo accessories.

Very good value for money Tamron Makro 90mm f2.8 Nikon mount on Fuji x-t20. Loss of autofocus, difficult but achievable focusing, see photos. Don't deprive yourself of this with quality goals

I have an older Tamron lens. It's a shame to just give this away. The adapter fits perfectly. Nothing wobbles. Sit tight. Top

Perfect service

I have an old Tamron lens. It's a shame to give this away as a gift. The adapter fits perfectly. Nothing wobbles. You sit down. Terrific

With this adapter I can use all my Nikkor or Nikon lenses on the Fujifilm E-X1. However, it is necessary to set the “Shoot without a lens” option in the menu, otherwise the shutter button will not click. The diaphragm is closed by the intuitive ring. I tried it with a G Sigma EX 1 lens; 4-5.6 with 10-20mm focal points (equivalent to 15-30mm of a full frame): The ring allows you to close the aperture while maintaining full aperture for manual focus, from 24cm to infinity. Of course, the Fuji ring works better for Leitz M lenses, since it is enough to set "adapter" and focal length and any distortions can be corrected. But it costs more than ten times as much. Focus is obviously done manually as with digital and analogue Leica Ms. The courier was unable to deliver on the scheduled day, claiming that "no one was there". Instead we were all there. Saturday to Monday. Then don't complain if Amazon will use drones.