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OK Tareq, you said you wanted to know how to physically mount both your Canon 300mm 2.8L IS USM lens and your guidescope to your mount. As you mentioned imaging, the suggested method is for use in equatorial and NOT Alt-Azimuth mode. It may seem like I'm being overly prescriptive (telling you how to suck eggs almost) , but that's what you wanted. This is A way to do it. There are others. One could improve the rigidity somewhat as I'll mention later. You can buy the components at various astro suppliers of your choosing.....
Best
JA
STEP 1. Take your lens and under the foot of the tripod lens collar you will notice a female thread. It is a 1/4-20 tpi UNC female (internal) thread.
Last edited by JA; 12-07-2018 at 02:14 PM.
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