davescliches

Depends on which 600mm F4 ......... the 600mm F4E FL VR is sharp wide open to the corners ...... F5.6 is a tiny bit better ............ I believe the 800mm FL is a bit sharper still ........ ...... ...

adjusting the mirror will also change the framing in the final image ........ differing from in the OVF ......... I'd put it back to where it was ........ and tackle the actual problem. ........ ...

Principle of the SDM motor. The principle of SDM motors is that there are two halves in aluminium ........... one side is coated with a layer of piezo electric crystal ........... the piezo side is ...

My first thought was dust on the AF module ..... then you wrote it ..... I had the K3 ..... the last before switching to Nikon ....... AF-S was Ok ish ..... AF-C just wasn't good enough ..... I was ...

........ beware !....... ...... you are now entering the world of compromised adjustment and risk ......... the mirror is designed to be perfectly positioned (the adjustment is there for that) ...

Actually it's 750mm ....... 500mm X 1.5 crop .. Wildlife/ birding shooters often need the reach to fill the frame for birds and more distant animals ....... and for example a 600mm FF lens becomes ...

Sorry I was just following along ....... but the OP wrote ....... "Tried adjusting the diopter but that just makes the whole thing blurrier or clearer, doesn't shift the focus."

This is not a mirror issue as the AF is accurate ......I would not touch the mirror as there is a hinged secondary mirror that shines down on to the auto-focus prisms ........... and the auto ...

To prevent any further squeaking keep the lens in a very dry place ......

Just at a time when the K3 III is actually arriving and has upped the game by finally having good reliable AF-C focus ......... would a K mount shooter really want drop back down to Panasonic's ...

It's a good lens ........ the question is whether the particular sample is good ....... ie.   I pursued a purchase and asked for some shots taken wide open of a distant scene to see whether the ...

The squeaking is caused by the aluminium AF motor having some surface micro corrosion ......... often seen after the lens has not been used for a while ....... this sounds bad, but usage usually ...

Stilt gives me the eye .......... 600mm F4E FL ........... egret catches the worm ........... Stilt bags a worm ...................... 600mm F4E FL+ TC14E III egret dances .............. 600mm F4E ...

The letter E has not been engraved so you can't paint it !!

As soon as I got the lens I fine tuned it at 150/300/450/600mm with the AFFT of the D500 / D750 ..... I found that -1 did it for all ......... in the meantime I ordered the tap in console, which ...

Who cares about the camera ......... you brought the right girl !!

Read here: I have the G2 lens and the Tap in console ......... before the TIC arrived I used the D500's AFFT to set the focus at -1 ........ it "hits the mark" at all apertures and all focal ...

I have the G2 lens and the Tap in console ......... before the TIC arrived a used the D500's AFFT to set the focus at -1 ........ it hits the mark at all apertures and all focal lengths/distnces ...

It was oil ! ..... though it probably would have been grease by now given the four year old post ......... I had the same thing on the D750 ....... shutter recall issue, sent in the camera, shutter ...

Bits fall off the edges ........ the plastic is silly thin !!