Gaston

Want to know about interference of TC's and lens glass ( with nikon 24-70 f 2.8. they say I can't use) I am planning to buy the Tokina 24-70 f 2.8 and want to know if I can use a teleconverter in my nikon D800 with the Tokina lens.

chaman

What you mean about interference?

Gaston

Because of the projection of the lens rear glass you can't couple the lens with the TC.

CHG_CANON Loc: the Windy City

The answer is likely 'no' you cannot use a TC of any brand with a lens covering 24-70mm. Each manufacturer is slight different, but the TCs tend to work with prime lenses 135mm greater or a minimum of 70-200mm on a zoom.

This link for Nikon is specific to Nikon lenses and gives a sense of the same details you should seek from Tokina.

http://www.nikonusa.com/en_INC/IMG/Assets/Common-Assets/Images/Teleconverter-Compatibility/EN_Comp_chart.html

Finally, new user introduction is not the section for this type of question.

chaman

You have answered your own question.

Gaston

I read before this Nikon article . Are you sure that this apply for Tokina ?. I will like the opinion of a Tokina 24-70 owner. Thanks for your opinion.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

Don't. TELEconverters are intended for use with telephoto lenses, not wide angle lenses. They are also not intended for use with most zooms, though some zooms, like the 70-200s and 200-400s work well with some TCs. It's only slightly more expensive to buy a 150mm lens than it is to buy a 2X TC to get to 140mm and the image quality will be 1000% better.

If you are on an APS-C camera, the Sigma 50-150 F2.8 zoom, the current version - is very good, and you can get them for $550.

If you are on a full frame camera, then you can get a used 150 F2.8 macro for around the same price (no stabilization).

waegwan Loc: Mae Won Li

Check the specifications on the converter and the lens. Here is some equipment that I have:

Tamron 2X works with:
Tamron 17-35 f/2.8-4 Auto focus throughout
Canon 28-200 Auto focus throughout in good light
Canon 24-105 Auto focus needs help on the 24 end otherwise OK
Canon 70-200 f/4 works fine but no auto focus
Canon 100-300 f/5.6 works fine but no auto focus

Canon 2X works with:
Canon 70-200 f/4 no auto focus

This is all mechanical stuff, picture quality varies.

RWR Loc: La Mesa, CA

I've not checked for any newer lenses, but the Nikon Compendium (1995) lists teleconverters for every wide angle Nikkor from the 6mm f/2.8, except those requiring mirror lock-up. It also lists teleconverters for every single zoom from the 20~35 f/2.8 to the 360~1200 f/11.0 ED. How they all perform, of course, is subject to opinion. I've used a 1.4X often on a 50~135 f/3.5, and occasionally on a 35~70 f/3.5, with no noticeable loss of image quality.

connievloutely Loc: Quaker State (PA)

I just bought the Sigma 150-600mm Sport version.

I am a Canon shooter.

So I have a Canon 1.4 II exender and th 2.0 I extender and tried them with my new purchase.

Bottom line with the 1.4 II extender I got a communications error.

And with the 2.0 I had no problems and a great image.

Of course I had to use Live View to have auto focus.

So I say try what you have, but be sure there are not any physical interference problems first.

jerryc41 Loc: Catskill Mts of NY

Here are some Q&A from Amazon.

http://smile.amazon.com/Kenko-1-4X-Teleconverter-Nikon-Digital/dp/B002C6QE00/ref=sr_1_1?ie=UTF8&qid=1455629138&sr=8-1&keywords=kenko+1.4+nikon#Ask

orrie smith Loc: Kansas

it would need to be a tokina teleconverter, if that is even available. using a teleconverter on a lens that is not recommended will ruin the lens

PixelStan77 Loc: Vermont/Chicago

Why bother if you will have a problem.

imagemeister Loc: mid east Florida

Here is a good explanation of tele-converters - written for Minolta/Sony - but has much broad application in general.

http://www.dyxum.com/lenses/teleconverters.asp

amfoto1 Loc: San Jose, Calif. USA

Teleconverters are generally intended for use with telephoto primes and zooms. They are not intended for and rarely work very well with wide primes or zooms that include wide angle focal lengths in their range.

For example, Canon recommends their teleconverters only for use on primes 135mm and longer, and their 70-200, 100-400 and 200-400mm zooms (the Canon 200-400 actually has a matched 1.4X TC built in, but some have used it successfully with separate TCs as well).

I shoot with Canon gear and used Canon TCs on Canon lenses: mostly a 1.4X II on 300/4, 300/2.8, 500/4 primes and occasionally on 70-200/2.8... and 2X II on 300/2.8 and 500/4 (IMO the 2X causes too much loss of image quality with the zoom).

Nikon has a more extensive compatibility bulletin regarding their own lenses and teleconverters. If you study it you'll find much the same "rules" apply, but Nikon also has to take into consideration auto focus drive and aperture control methods differences among their cameras and lenses.

Olympus, Pentax, and Sony/Konica-Minolta/Minolta shooters should look for info specific to their own systems, since there are a lot of differences between what the manufacturers make and recommend.

Some teleconverters do not have protruding front elements, so might not interfere with lens rear elements or have other interference issues (some with protruding front elements wont fit inside the rear barrel of a lot of lenses). Those are mostly third party "unmatched" TCs... such as Kenko (Tokina), Tamron and Sigma. But, even if they do physically fit without any interference, there will probably still be a price to pay with significant loss of image quality, using one on an atypical lens or zoom such as a 24-70mm.

Frankly I cannot imagine ever needing or wanting a 1.4X, let alone a 2X on a 150-600mm zoom. That's unlikely to give very usable image quality. Even if the IQ wasn't ruined by the optical combination, it would mean shooting distant subjects through so much atmosphere that there would be a lot of loss of IQ to that, too. Plus it would be quite difficult to get a stable shot, even with image stabilization.

Instead of using such an extreme combination, if not already doing so I'd use the lens on a crop sensor camera. 600mm is a whole heck of a lot of focal length on an APS-C camera. If that's still not enough, I'd simply get closer to my subject!

Note: There aren't any TCs currently being made under the Tokina brand name, but Kenko is the same company and they offer several TCs.