Notes:
Question | Answer |
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Do I really need to remove the metal ring from the TC to file off the tab? | Leaving the metal ring on the TC while filing off the tab is a recipe for disaster: you could inadvertently touch the TC lens element with your file/dremel and completely ruin it, or the metal filings could (and will) get in the TC mechanism or on the lens element and severely scratch not only the TC but potentially also the lens you mount on the TC. So, I guess that would make the answer 'Yes'! |
So what's the purpose of that tab?? | Well, I guess that's a question only Nikon can really answer. However, as far as I'm concerned, the only reason for that tab is to physically prevent non AF-I/AF-S lenses from being mounted on these TCs. Since these TCs don't have the screwdriver connection for the AF motor, Nikon really never intended them to be used on those lenses. |
Does filing off the tab change/break anything as far as functioning of the TC with AF-I and AF-S lenses? | Not that I'm aware - I've been using a modified TC14E since 2000 and haven't had a single problem. There's absolutely no change in function when mounted on an AF-I or AF-S lens (I'm using the following lenses myself: 80-200mm f/2.8 AF-S, 300mm f/2.8 AF-I, 200-400mm f/4 AF-S VR). |
Can I maintain AF with a modified TC14E or TC20E on e.g. a 80-200mm f2.8 AF-D or 300mm f4 AF (non AF-S)? | No. Only AF-S/AF-I lenses maintain AF (if the maximum aperture is f8 or better, and only in ample light on a high-end body). If you want to use a teleconverter on an AF-D lens, you should look into the Kenko Pro series of teleconverters |
Can Sigma lenses be used with a modified TC? | I do not have any Sigma lenses myself, but users have reported the following:
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When stacking TC's, do I need to following a specific sequence of mounting everything? | No, I have never noticed any difference or had any trouble, regardless of mounting sequence: Camera + TC1 then TC2 then lens, or TC1 + TC2 then camera then lens, etc. |
Can I put a modified TCxxE on a Nikon 18-200mm f/3.5-5.6G IF-ED AF-S VR DX, Nikon 70-300mm f/4.5-5.6G AF-S (VR or non-VR) or Nikon 55-200 f/4-5.6G AF-S (VR or non-VR) DX? | Short answer: No Long answer: the TC may physically fit - I don't know, I haven't tried. You'll probably have an issue with the front TC element bumping into the lens rear element on the short end of the lens. However, even if it does fit, you'll most likely be very disappointed with the result - these are fine lenses in their category, however a TC will lead to decreased contrast, decreased sharpness, etc. Also, using these lenses at the long end means you're at f/5.6. Add a TC14E and you're at an effective f/8, so autofocus is highly unlikely to work. So you're back to manual focus, which is not evident with a viewfinder as dark as you'll have at f/8, especially with today's focusing screens which are optimized for AF. |
I have an old TC14B and an unmodified TC14E. Can I use the ring of the TC14B on the TC14E so I don't have to grind off the tab on the TC14E ring? | No, the ring from a TC14B will not mount on a TC14E. The rings are same size, but the ring from the E seats slightly differently into the TC body. |