Tamron 400 F4.

Started Jun 22, 2014 | Discussions thread
OP yesman12 Contributing Member • Posts: 918
Re: Tamron 400 F4. now with 1.7 AF TC

I took some shots with the 400 & Pentax 1.7AF TC and compared it to DA*300 & Pentax 1.7 AF TC.

I tired to position myself such that the image size is the same.  The first of these shots is DA* & TC The second is the tamron 400mm &TC.  I move backed to approximate similar FOV.  Note that I cropped and adjusted exposure to try to get both to be as equal as possible.  Both are at F6.7  (F4 on the lens but adjusted due to converter) and ISO 400.

I think the DA* is capturing more detail, but not by much.... Note that both do not show much CA.  I even pointed the 400&TC onto tree branches but am not getting much PF... CA seems to be ok( some Green but not awful).

Comments please

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