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Hi there everyone,

I was recently loaned a long telephoto lens (Canon EF 500mm F4), it's a fantastic lens and I really want to do some AP with it but I am not sure what's the best way to mount it. I have a AZ EQ6 mount with an ADM Side-by-side bar which accepts both Vixen and Losmandy dovetails. Does anyone know of a solution. Here's a couple of photos:

The mounting bar currently attached to the lens foot is too wide for a Vixen attachment bar and too narrow for a Losmandy.

Thanks everyone

😀 Dan




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Thanks for the replies, I do have a spare vixen dovetail and I can run a screw through one of the holes but the spacing is different on the lens foot so I can only get one screw in. I may have to drill a new hole through the dovetail bar to get this to work...

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11 hours ago, spaceman_spiff said:

Hi @Skipper BillyI just measured the screw holes in the foot of the mount...looks like they are separated by 3.6cm, shorter than my long vixen dovetail. Hi there

@Philip R do you know if the two holes in the medium Vixen dovetail match with the mounting foot (separated by 3.6cm)?

Thanks for all your help!



The 18cm dovetailbar has two slots plus a 1/4” hole/thread in the middle. Unfortunately I have temporary mislaid mine to measure it. :cussing: 

The underside is recessed and I use 1/4” socket cap screw/bolts and washers and the heads do not protrude and do not scratch or foul the saddle plate.

I can also just fit it in the saddle plate of my camera ball-head (non-Arca Swiss type) mount without any issues.

Edited by Philip R
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