Our UHC-L filter can be used both as a L-filter for mono cameras to increase contrast, and as a light pollution filter for standard OSC colour cameras. It is therefore also perfectly suited for OSC cameras.
Answer by: Baader Web Team (Admin) on Feb 23, 2024 9:36:00 AM
The MPCC spacer ring only works with the Protective Ring for Canon, our Wide T-Rings - it doesn't have an M48-thread on both sides, but the dove tail fits into the dovetail of our T-2-rings. It may work with other T-2-rings if they use the same dovetail to make the thread rotatable - but there is no standard dovetail.
If you screw a camera directly to the M48-thread, it will be too close to the lenses, and there will be distorted stars, so you need a spacer.
The best option would be the use of a standard T-ring instead of an M48-ring, or - more expensive - a wide T-ring plus the M48-spacer.
Answer by: Baader Web Team (Admin) on Feb 22, 2024 9:53:00 AM
I need to know how to set up the optical train to achieve magnifications between 3-4X for prime imaging. I'll use an APO refractor and a fullframe mirrorless camera. If I understand the schematics, for a 3X, I'll need a tube extension of 96.2mm, Then goes the FFC followed by an M42 to camera's flange adapter. Can you confirm this is right?. Also, If I insert a helicoid focuser between the tube extension and the FFC, would it serves as a variable magnification, for example, a 60mm extension + 36-90mm focusser would function as a 3x to approx 4X variable magnification optical assembly?.
The 96,2mm for 3x are measured from the base of the thread to the camera sensor, so you need to take the backfocus of the camera in account, too.
E.g., if you use a DSLR with a standard T-ring, it has a flange focal length of 55mm, so you need an extension of 96,2-55=41,2mm between the camera and the FFC to get to 3x. That is, with a 40mm T-2-extension #1508153, you're pretty close to 3x; if you want it perfect, you can add another 1mm T-2 fine adjustment ring (#2457910).
The FFC is inserted into the 2" eyepiece clamp of your telescope.
Instead of a T-2-extension with a fixed length, you can use a sturdy, small focuser or something like our VariLocks, too. As long as there is no tilt, it doesn't matter how you achieve the desired distance.
Answer by: Baader Web Team (Admin) on Feb 22, 2024 10:08:00 AM
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