Anyone use teleconverters?

[pecrow]

Sorry if i'm being a bit dim but a newly acquired kenko 1.5x tc is confusing me.

i know this costs 1 stop of light but when i fit it to a 35-135 lens on my 30d, it causes the camera to overexpose. if i dial in -1.0 to -1.3 stops exposure compensation, its about right. this is the opposite of what i expected.

i expected the metering to cause underexposure, why isnt this the case?

[DonnaM]

I do not have to correct for aperture, exposure or anything so it may be your camera/lens/ TC combination that is not communicating properly.

[arclight]

I'd do a check on the lens make & model compatibility with the TC. There is no universal compatibility with these things even if the bayonet mount is correct.

[Martyn...]

Sorry if i'm being a bit dim but a newly acquired kenko 1.5x tc is confusing me.

i know this costs 1 stop of light but when i fit it to a 35-135 lens on my 30d, it causes the camera to overexpose. if i dial in -1.0 to -1.3 stops exposure compensation, its about right. this is the opposite of what i expected.

i expected the metering to cause underexposure, why isnt this the case?

May not be compatible with that lens, try reading through this LINK (http://photography-on-the.net/forum/showthread.php?t=41922), you may find some info that relates to this issue

[pecrow]

many thanks for the link martyn, some reading to do...