ttl metering of the M6

[tom_tong]

A stupid question not asked before. Since the M6ttl takes exposure reading through the lens, should I need to focus the subject first and adjust the exposure according the the camera's meter - i.e. the light metering will be exact only if the subject is in focus OR I need not to focus and just point to the subject (through the viewfinder) and adjust the exposure rightaway? Thanks and regards,

[msitaraman]

This is actually a very good question, but in practice, I've not

noticed any systematic metering error in say, focusing on far away

objects and then metering off a nearby (defocused) area.

[jay_.]

This is something you could easily check by metering the same scene

at one extreme and then racking the lens to the other extreme and

seeing if the meter changes. I suspect it will not vary enough to be

of practical significance. The timed speed of the M6's shutter will

likely vary much more from one shot to the next.

[john_collier5]

It is not a factor with the short focal lengths. Longer lenses (90

and up) will lose 1/3 to 1/2 a stop from a reading taken at infinity

(or with a handheld meter). When using my M2 or M4-2 with my

90/2, I always add a 1/3 stop more if I focused close.

[sheridan]

Hello Tom. In practice with a 90mm. or 135mm. focused to their

respective close focus distances of 1 metre and 1.5

meters,giving repro. ratio of 1:9, exposure factor (increase of

exposure) is 1.2X , which is small indeed. Regards.

[alan_purves]

My 1972 Spotmatic's manual specified to focus first, then set the

exposure. However, I cannot say that it ever made much difference.

 

<p>

 

Regards :-)