Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Will FT1 work for  Nikon 1 J4 camera and my nikon AF-S Nikkor 70-300mm 1:4.5-5.6 G lens? Would it be a good combination for shooting birds?
Document: Most of my lenses are AF-S Nikkor Lenses. My wide angle 17-55mm 2.8G, and Telephotos:70-200mm 2.8G, 70-300mm 4.5-5.6G. They work as advertised with thisFT1 adaptor, which gives me a lot more versatility.
Tripod live view focusing is great.5. For AFS, autofocus is very good and manual focus using the range finder is excellent. Exif data is captured by the 1V1.6. For AFD, there is no autofocus, but the view finder and monitor work well.7. Now to the 70-200 F/2.8VR, which is not listed as a compatible lens. I saw reference in a Nikon magazine article to this lens being used with the FT-1.
I bought this understanding that I wouldn't get advanced AF features, and I'm ok with that. I bought it so that my 70-200 would turn into a 540, for $200 I can get away with not having the features of a much, much more expensive lens. I've been shooting photos of a newly adopted dog with it around the house along with the 35 1.8 dx lens. It's been excellent for getting lots of light in and a nice narrow depth of field.
The V2 FT-1 AF-S Nikkor combination ONLY uses auto-focus from the central area of the lens and in some circumstances (I haven't figured out yet exactly what) fails to auto focus at all and manual focusing is necessary. I have experience the same issue with my AF-S Nikkor 80-200mm f/2.8 lens too.Secondly, I have a 10.5mm Nikkor fisheye which is listed as compatible with the FT-1 but it ONLY functions with manual focus.
I have a NEX 5 but got the V1 because I have the Nikon primes.1st problem - the v1 firmware was not updated so the ft1 couldn't work.The 35mm DC f1.8 worked fine bur when I got home after work and put on the AFD 85mm f1.8, the AF was sloppy, hesitant and often failed.Maybe the 85mm is too heavy for the FT1 to af?
The Nikon 1 system impressed me and it has done it again. This adapter fits without a hitch. I tried using a lens not on the list as far as compatibility. The Tamron 70-300mm VC works and that is a bonus. I do however have the Nikon 55-300mm lens as well and all I can say is... WOW. I see no hint of chromatic aberration at all shooting foliage covered with snow.
I used this adapter with my Nikon 1 v1 and a 300mm f4. With the crop factor I had an 810mm F4 lens to photograph birds. Manual focus worked better for me under this circumstance. And, of course, a good tripod. I highly recommend this adapter. Check out the video using this set up here [...]
The FT1 gives the camera awesome telephoto options but then limits the autofocus capabilities; that really irritates me because I'm sure they went out of their way to do this!Imagine if they allowed all the AF abilities on the FT1. Suddenly birds could be tracked while flying! Things running towards you could be in focus all the time and all you'd have to do is hold the shutter down.
I participate on a few photography forums and almost everyone who gets this FT1 adapter use it for telephoto long shooting because of the outstanding 2.7x crop factor. Suddenly 200mm becomes 540mm and any longer lens you might own becomes perfect lenses for wildlife and birding.The V1/J1 and FT1 adapter would be perfect wildlife photography (or portraits on people) except Nikon has decided to hold back the capabilities.
I use this on my Nikon N1 V1 body to use a Nikkor AF 50-300mm lens. Easy to use and works great!
Answer: Yes the Ft1will work for your j4 you may lose some functionality of your lens and your lose about a stop and a half. Birding? A camera is good for what you use it for after that it is a matter of personal satisfaction and sacrifice.