EM1X + Oly 100-400 Nov 14 2020

Started 5 months ago | Photos thread
Paul Auclair
OP Paul Auclair Veteran Member • Posts: 6,139
Re: Great Photos and nice summary of the lens

rz350 wrote:

Just curious to know how well the tc 1.4 works with the 100-400? Do you stop it down? If so, to what F stop? Just want to have some starting knowledge since I just ordered one with black Friday sales and such.

i 'tested' (loosely) the 1.4X and 2.0X but mainly just to judge the provided IQ and at reasonably short distances. I did use the 2.0 real quick at a lake (a bird on the opposite shore) but there was too much distance in the image so that's my bad and I wouldn't keep/share those pics.

there is a lot of info on the web regarding the Oly 100-400 and the TCs that you can look up. Robin Wong has some great images with the TCs and does Petr Bombousek (and his friend).

as far as AF goes... S-AF didn't seem to slow but I was testing on static objects mostly.

you really are going to need a lot of light to allow for good C-AF (not waiting for acquisition) performance.

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as always,
thank you fellow DPR members for your kind words and encouragement.

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