"worth" is quite subjective, and has many factors. A new NEX-5T kit is US$700 and a new A7 kit is US$3000, if price is not a factor (considering your net worth, and your return of investment), I will settle for a A7 or better still A7r any time.
Don't over look the EVF on the A7/A7r, although...
Recently, I purchased a Sony NEX3N 16-50mm (~US$400), among my other photo equipment. Despite, some bad review on Sony lens, I think both lens and body are wonderful and perform beyond my expectations. You also can do so much more with a mirrorless body, if you wish, and with so little money.
I have few enlarging lenses hanging round from the films days. As you can see on the picture (a thousand words), I put a Rodenstock-Ysaron 135mm f4.5 enlarging lens on a marco extension bellow (plastic cheapie $36.49 on ebay). I use "M" setting to set the "shutter" speed and ISO on the D3000...
Thanks for the clarification. I use other lenses (not necessary old lenses or it is cheaper) on the NEX-7 because that is what I want and I like to do it. You are probably more or less my side, however iPhoto17 [op] is addressing another issue as well. Please look up a few posts, " ...but the...
The price has increased quite a bit, I remember not long ago, it was less than $400 on sale. I didn't buy it then, I don't think I will buy it now. It was certainly in my list of lenses in terms of price and quality for a D7000. Like KmH said, I can't stand the f/4.5-5.6 setup.
The questions is the animals that you are going to photograph are dangerous animals, such as: lions, tigers, alligators,... Are they behind bars or running free where you stands, or lying down? If they were running free, I would say you need another lens like fish needs water. You will need a...
I agree with you with the evf, but not everyone wants a evf. Take a look at 5D mkII, many spend hundreds of dollars to buy a LCD scope to avoid to look through viewfinder. I like a EVF that is why I bought a NEX-7. You are wrong about the manual focus, the only way to focus the Pentax lens is...
You will have to shoot with "M". and no light meter. Olympus E-P1 is not expensive, and has image stableizer. Don't take my word for it try it out, or ask someone who has.
http://www.amazon.com/Olympus-Thirds-Interchangeable-Digital-Body/dp/B002CGSYKI...
I haven't use this before. I know someone from the past who has, but I didn't get a recommendation from him.
A closeup filter: Opteka 10x High Definition II Professional Macro Lens OPT10X72
In my opinion Pentax lens on a Nikon body is not a good combination, however
you can do it:
Pentax PK Lens to Nikon DSLR Body Mount Adapter Ring | eBay
You will certainly lose camera body function.
The adapter will have a corrective lens in it, because the flange-focal-distance of a Pentax K (45.46mm) is smaller than Nikon F-mount (46.50mm). If the Pentax lens you have does not interfere with the corrective lens in the adapter, then, in general, you can use it on all the Pentax K lens and...