| sillyconguru |
| (enthusiast) |
| 13/10/2008 20:02 |
|
Re: AI manual lenses with D40?
|
Quote:
I'm thinking that I will get more mileage with a Canon DSLR with an AIS adaptor.
Full-aperture metering won't be available, the lens' diaphragm will stop-down as the aperture ring is rotated. If you would want accurate focus then this would have to be done at full aperture then stop down just before shooting (a bit like using 1960's preset lenses).
If you wish to use (say) wide angle lenses stopped-down and focus by means of the distance scale, or use telephotos wide open, then this route might be OK for you. Buying a S/H D200 might be more beneficial though.
Quote:
The fact that TTL flash will not work with AIS lenses surprises me, this must be a marketing decision over an engineering one.
The camera doesn't know that a lens is fitted let alone what aperture has been set. iTTL flash requires pre-flashes at full aperture to determine the output needed at the set aperture, if the camera doesn't know what aperture has been set then it can't work out the amount of flash output needed. Bodies such as the D200 and above can meter with AI lenses, iTTL is possible.
iTTL isn't the be-all-end-all, non-TTL auto flash (available with some new and many older flashguns) can give very good results.