Does Tokina-12-24mmF/4Pro DX complies with Nikon-D3 FX Format

Unless you have a lens collimator and other equipment needed to ensure proper alignment when reassembling the lens, take it to a good camera shop and have a properly trained and equipped professional clean it.

Tokina makes their lenses with a variety of mounts. A lens with Canon mount, for example, won't fit onto a Nikon. Assuming you get the lens with a Nikon mount, then yes, you can use it with a D70 and with a D700.

Yes and no. The lenses will fit with no problem.

On DX cameras (everything except the D700 and the D3 series) the smaller sensor causes the lenses to seem longer. A 50mm lens on a digital body will give you about the same image as a 75mm lens would on a film body.

Older non-CPU lenses do not have the electronics to communicate with a newer camera. On some of these cameras you won't be able to use the camera's light meter.

The FX format uses a sensor very close in size to a frame of traditional 35mm film, about 36mm by 24mm. The DX format uses a smaller sensor, about 24mm by 18mm. The smaller sensor allows the camera to be smaller (compact point&shoot cameras use sensors much smaller) and also are less expensive.

The most visible effect of the difference is the so-called lens multiplier. The smaller sensor uses only the central portion of the image projected by the lens, in effect multiplying the focal length of the lens. In this case, a 100mm lens attached to a DX camera will give just about the same picture you would get with a 150mm lens attached to a FX camera.

In general, FX lenses will work fine on DX cameras, taking into account the lens multiplier mentioned above. DX lenses will not work properly on FX cameras, since the smaller DX lens won't always capture the full images needed to cover the larger FX sensor. Some FX cameras automatically switch to DX mode when it detects a DX lens.

try this link http://www.thkphoto.com/digital/dp-01.html

I suggest that you contact Tokina directly to find out what range of temperatures your lens is designed to work across.

Your expression "cold weather" is an imprecise term; where I am in the UK means at worst down to a few degrees below freezing and usually a bit above, but when I'm in Moscow they don't consider it to be cold until the temperature drops to around minus twenty-five Celsius.

Depending on where you are, your lens may simply be unable to cope with what you describe as cold weather but you won't know until you have the specifications from Tokina. If it turns out that your lens is not performing as intended, then the manufacturer will be able to suggest remedies to you.

Sorry I cannot be more specific but Tokina do not appear to have published the range of operating temperatures in the public domain.

At Cameta Camera for $649,
B&H has it for less at $599 but it's out of stock.

http://www.cameta.com/Tokina-11-16mm-f-2-8-AT-X116-Pro-DX-Digital-Zoom-Lens-Nikon-AF-38451.cfm?utm_source=googlebase&utm_medium=base

http://www.bhphotovideo.com/c/product/554035-REG/Tokina_ATX116PRODXC_11_16mm_f_2_8_AT_X_116.html

Only the MkII version of this lens has an autofocus motor built in, the MkI relies on a motor in the body of some Nikon AF SLRs to autofocus. The D70 does not have an inbuilt AF drive motor, so if you have the MkI lens then you can only use it in manual focus mode on your camera.

This will depend on the lens you have now.

Some Tokina lenses have a universal fitting, with a separate adaptor mount for each camera body they fit. Its usually the last 5 - 10mm of the mount, and its identifiable by a second release button, which allows the specific fitting to be changed. If you have one of those, you just need the Nikon fitting.

If the P/K mount is an integral part of the lens, you have a couple of choices.
(1) You could get an engineering shop to alter the mount. This costs a lot and probably isn't worth the hassle. (It might be better to sell your lens and buy the nikon equivalent).
(2) You could use an adaptor. These are readily available on eBay.
For example:
http://cgi.ebay.co.uk/Pentax-PK-K-Lens-to-Nikon-AI-AF-F-camera-mount-Adapter_W0QQitemZ150400359906QQcmdZViewItemQQptZUK_Photography_CameraLenses_Lens_caps_hoods_adaptors_ET?hash=item23048f5de2

Note that just because it has the right (i.e. Nikon) fitting, it doesn't mean that it will necessarily have full functionality on the body you intend to use with it.

Some Nikon bodies are "extremely fussy" about which lenses they can use, and it might be worth evaluating whether your proposed solution would work with the camera body you have in mind before committing to any sort of expenditure.

B&H Photo/NYC has them in stock: B and H