Question about a doubler?

[Sticks&Strings]

I have an old 2x adapter or doubler for my canon 7d. It went to an old 35mm camera of my dads. If I use it with my camera and lenses, will it affect the clarity, f stop, depth of field, or anything aside from the zoom?

[captainsling]

I may be wrong but I think you lose 1 f stop when using one. The one I bought said it will not work with a 5.6 but it works fine except the auto focus. You have to focus manually.

[scotty]

While the teleconverter will bring things closer, it will degrade the clarity and resolution. You will lose two f-stops. ie: A 2.8 lens becomes a 5.6 lens, an f4 lens becomes an f8. Your auto-focus will slow way down, if it works at all. I'm not sure what effect it has on the depth of field.

[teamone]

x2 on Scotty's post. Still useful depending on what you're shooting. Fast action - no good. Still wildlife shots in good light - good!