problems with my D90 and the 100-400mm tamron

Started 4 months ago | Discussions thread
Kazmarov Senior Member • Posts: 1,238
Re: problems with my D90 and the 100-400mm tamron

OK - that sounds reasonable enough. That leaves, in my mind the following options:

- incompatibility with the D90 (Tamron do not list the D90 as compatible - as Michael says)

- at the long end the Tamron & Sigma gets to f/6.3 very quickly & the focus system cannot operate reliably

- firmware not up-to-date (on the Tamron) but I doubt if that would be the issue because of (1)

Generally phase detect is the focus system used when in OVF, contrast in LV in the old currency - newer cameras have various hybrid deployments.

 Kazmarov's gear list:Kazmarov's gear list
Sony RX100 III Nikon D90 Canon EOS 60D Nikon D5500 Nikon D7200 +10 more
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