80D underexposing?

[pfehlauer]

I sent my new 80D to Canon for repair: 80%v of the shots are underexposed. It comes back and it STILL does the error. Now I am tipping on the lens....it seems to work with a Canon lens, but not with the Tamron, which is the lens I want to use on this camera.



I posted already in the Tamron forum, but maybe someone here has some experience as well.

The lens does NOT underexpose on my 7D, nor did it on the 50/40D, nor am I sure if that is even possible that the lens interferes with exposure....

Any clue? Below, the test shot done yesterday, AFTER repair (reportedly...).



txs







--
Pedro
'The opinions expressed herein are not necessarily those of my employer, not necessarily mine, and probably not necessary'

 

[stomrunner]

I sent my new 80D to Canon for repair: 80%v of the shots are underexposed. It comes back and it STILL does the error. Now I am tipping on the lens....it seems to work with a Canon lens, but not with the Tamron, which is the lens I want to use on this camera.

I posted already in the Tamron forum, but maybe someone here has some experience as well.

The lens does NOT underexpose on my 7D, nor did it on the 50/40D, nor am I sure if that is even possible that the lens interferes with exposure....

Any clue? Below, the test shot done yesterday, AFTER repair (reportedly...).

txs



--
Pedro
'The opinions expressed herein are not necessarily those of my employer, not necessarily mine, and probably not necessary'

There is always a chance that a 3rd party lens may not work. You should send the lens back to Tamron for updates. Canon is obviously not keen on making sure you can use Tamron lenses with their cameras.

 

[RedFox88]

Try a different lens

 

[pfehlauer]

Thanks guys, yes, a different lense does not reproduce the underexposure...I just wanted to see if there are some other experiences...

 

[Jura S]

Thanks guys, yes, a different lense does not reproduce the underexposure...I just wanted to see if there are some other experiences...

 

[pfehlauer]

Evaluative on toth, and in program mode.

 

[Jura S]

Evaluative on toth....

What does that mean?

 

[Dave]

If consistent, why not adjust with a little EV?

 

[Steve-P]

Evaluative on toth....

What does that mean?

Typo, "both".

 

[Jura S]

Evaluative on toth....

What does that mean?

Typo, "both".

 

[herion]

Is "lens abberation correction" turned on or off on the 80D?

 

[Sailor Blue]

Do you have an 18% gray card?

If you do you can place it flat on to direct sunlight at about 2pm and check the camera's meter reading. Make sure there is no direct reflection of the sun into the lens and you aren't casting a shadow on the card.

You should be getting f/16 at ISO 100 and 1/100sec ± 1/3 stop...

B&H - Kodak R-27 Gray Cards

 

[WilbaW]

Exposure compensation is a per shot setting. Use it to get the image brightness you want in any case.

 

[pfehlauer]

thanks for your help, sorry for my typo.











--
Pedro
'The opinions expressed herein are not necessarily those of my employer, not necessarily mine, and probably not necessary'

 

[pfehlauer]

It seems to have a relationship with the lense. Testing with a similar range canon zoom (the closest I have is an old 28-105), yields consistently well exposed pics.

I contacted Tamron and they said that since it is an old lens (old...6 years!), they do not guarantee compatibility with new cameras, they do not even test them.

Will keep testing, but it is very disappointing since this should be my light travel gear for short trips, and that lens is absolutely fantastic for that.

 

[BAK]

Too bad, but that is an old lens in digital camera terms, and you're going to need to buy a new lens that actually is compatible.

BAK

 

[pfehlauer]

Yeah, I guess so. Txs

 

[pfehlauer]

Just to close the loop, I guess I have to admit that it is just plain incompatible. Today, I tested against another lens, and this is the result, I would say, pretty selfexplanatory.



Tnxs all for reading and commenting



rgd







s, Pedro

--
Pedro
'The opinions expressed herein are not necessarily those of my employer, not necessarily mine, and probably not necessary'

 

[herion]

Grrr

 

[Andy01]

Unfortunate, but another good example of why to be cautious of 3rd party lenses.

Colin