Can this adapter be locked at specific proper optical-length position, and at the same time maintain/hold a camera sensor perpendicular to the optical axis of a telescope (perpendicular to 0.01 degree or better, specified by Celestron's RASA manual) ? I've tried to look into the pictures of this adapter and I guess I can figure out how this adapter should be fixed onto other adapters with S70 dovetail, and how it is continuously adaptable on its optical length. However, the adapter seems to me have no locking mechanism to lock on specific optical-length-position, so I'm worried about this. PS.My plan is to add this adapter after two 5mm S70 extension adapters, and install the UFC filter base after this adapter (planed total optical train: telescope side adapter RASA plate->5mm ->5mm ->this # 2459145 ->UFC filter base and a UFC filter slider -> #2459119 S52 and # 2408331 S52-to-Fuji-X adapters -> my Fujifilm mirrorless camera). Thank you.
Question by: LIAO on Oct 17, 2018 11:36:00 AM | 1 Answer(s)
Of course you can lock the S70 VariLock. Adjust the length by turning the knurled outer ring and lock it by turn in the side with the S70 male. To
avoid tilt problems all UFC parts are manufactored very precise. Please hold in mind that some camera manufactorers build in the sensor not
so pretty exactly so you may have to turn the push/pull screws from the RASA anyway.
Okay, after setting the length of the S70 VariLock to 18,8mm (please controll it by using a good caliber) you should have a good start. Or set it
to 19,5mm when using 2mm thick filters. As a rule of thumb the focus point gets lay out to extra focal at a third of the filter thickness (~0,7mm)
because of refraction. To stay homo focal and to receive lights it is of advantage using a clear glass or UV/IF filter.
Answer by: Baader Web Team (Admin) on Oct 17, 2018 3:51:00 PM
I could use an adapter like this in conjunction with the UFC to adjust to the exact backfocus/metal back of the Tak 1.01 flattener. Can the adjustment, when optimal back focus is achieved, be locked to prevent accidental drifting?
And which payload can the mechanism bear without risk of flexure. The equipment behind the Varilock weights about 1 kg
Question by: Thomas Garland on Mar 13, 2019 7:18:00 PM | 1 Answer(s)
The outer block knurled ring locks the distance of the adjusted length. The ring can bear a 1Kg payload easily.
Answer by: Baader Web Team (Admin) on Mar 26, 2019 8:06:00 AM