Hello all! I recently picked up a Sigma 1.4x EX APO teleconverter, for use with my Sigma 400 mm f/5.6 APM Macro lens and F70/N70 body. I've got a couple of questions that I am hoping fellow Nikonauts can help out with. (1) I understand that I lose one stop of light with the 1.4 attached, but the camera's TTL metering will compensate for it the various autoexposure modes. However, on the camera's LCD display, I do not get the effective aperture, i.e. when I set the lens to 5.6, I see 5.6 on the display instead of 8 and so on. Does this mean that when I am using manual exposure, I have to add a stop? For instance, if by setting the lens aperture to 5.6 and shutter speed to 1/400, the meter shows OK exposure, would I actually have to go ahead and halve the shutter speed, to 1/200, since the camera thinks the aperture is 5.6 when it is really 8? (2) There is a slight "give" between the lens and the TC. In truth, I noticed this earlier, with a not-a-super-tight-fit between the lens and body (you could shift the lens slightly by rotating it), though not quite as pronounced as it is now. Is this normal for a relatively big lens such as this? I suppose what I should do about this is to take the lens back to the store (I don't think it is the camera at fault, since my other lenses fit very snugly/securely, though none of the lenses are as big as the 400 mm), but I am reluctant to do this right away since I mail-ordered the lens from B&H in New York (FANTASTIC establishment, by the way), and I live on the other side of the planet in Malaysia! The lens is new (less then a couple of weeks old) so it cannot be wear and tear, and I am hoping that this is a normal or not too significant situation, and thus would like to hear from other owners of this lens out there. Any advice, opinions, comments, or miracle-cures are welcome. -- jeet
