Tamron 80-210 f3.8 (03A) infinity focus

GrahamNR17 · Expire: 2012-09-06

Hi everyone,

I bought this lens three years ago, around the time I stopped photography. I know it is not as good as the 103A version that came after it, but for some reason it always remained my favourite.

So, now I am taking photos again, I got it from the drawer for a good test run. It is this lens:

I am having trouble with infinity focus at the 80mm end. At 210mm it is fine, infinity focus is perfect - except camera shake Embarassed

At 210mm:

At 80mm:

Is it screwed?

Cheers,
Graham

torbod · Joined: 31 Jan 2010 Posts: 379 Location: Sweden

I don't know if it is screwed, but that house seems too close to judge infinity focus. Despite camera shake, I think it looks like focus is not perfect on 210mm either!? Can you aim at something further away?

I had troubles with a cheap noname Adaptall adapter being too thick. I machined it down a few tenths of a millimeter and eureka, infinity was perfect.

Is infinity focus perfect with any other lens on that same adapter?

/T

GrahamNR17 · Expire: 2012-09-06

I think camera shake wasn't helping the focus on the house chimney Embarassed

I will repeat the test tomorrow with a different adaptor, just in case it is faulty as you ask.

Here are two other photos I did today. I focussed on the distant tree which was much further away than the chimney. I got a focus confirm at infinity at the 210 setting.

210mm:

80mm:

These pics show just how far out the focus is at 80mm Sad

torbod · Joined: 31 Jan 2010 Posts: 379 Location: Sweden

Yeah, it is really weird that they are so far apart. But I have no knowledge in why this can be.

/T

Olivier · Expire: 2015-08-06

Maybe hazy glasses ?