Focusing Helical Popular Q&A

Q: How to Make a Helical Focuser Out of PVC Piping.
A: 1. Wrap cooper wire around the PVC pipe in 1 3/16-inch intervals. Measure and mark the intervals with a pencil. Coil the cooper wire starting at the end of the ... Read More »

Q: Will a helical focuser mitigate 'image-shift' problem?
A: Use a zero image shift focuser (i.e. a refractor-style focuser) on the rear cell. I own an 8" Celestron SCT and a 4" Synta Mak, and do not find mirror flop or i... Read More »

Q: What are helical focusers and why does Borg use them?
A: Helical focusers work by turning a ring to focus as we do when using a conventional camera (at least in manual focus mode). A true helical focuser works like a ... Read More »

Q: What is the racked-in height of the 1.25" Helical Focus Mount?
A: 38". The racked-out height is 2.38". Read More »

Focusing Helical Helpful Resources

Where to find a Helical Lens mount? - Photo.net Large Format Forum
I was wondering if anyone knows where I can get a Helical Focus mount? .... helical and subsequently the lens from spinning while focusing.

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The above is "Focusing Helical: Photography: William Optics 1.25" 90-Deg Erecting Prism Diagonal With Helical Fo..." recommended related products, Please click on the picture to see product details and focusing helical reviews!