How do I use the millimeter scale to set a precise length on the Baader VariLock 46?
First, loosen the knurled locking ring with the included hook wrench. Next, turn the inner tube until the engraved millimeter scale aligns with your desired length at the edge of the locking ring. Once set, hold the position and use the hook wrench to firmly tighten the locking ring. For maximum precision, you can verify the length with calipers before the final tightening.
What makes the Baader VariLock 46 "torsion-resistant" compared to a helical focuser?
Many variable-length adapters or helical focusers can introduce sag or unwanted rotation as you adjust them, especially with heavy cameras. The Baader VariLock 46 uses a separate, robust locking ring that clamps the extension at a fixed length, preventing any unwanted movement, flexure, or tilt once it is set.
What is the advantage of using the S52 adapter on the Baader VariLock 46?
The standard T-2 thread has a limited inner diameter that can cause vignetting on cameras with large, full-frame sensors. The included S52 ring-dovetail adapter replaces the T-2 male thread, creating a wider, un-obstructed light path directly into compatible Baader T-rings (like those for Canon EOS or Sony NEX). This is crucial for illuminating the entire sensor without compromise.
Can I rotate my camera for framing after setting the length on the Baader VariLock 46?
Yes. The camera-side adapter is held in place by six small set screws. By slightly loosening these screws with the included hex wrench, you can rotate your camera to the desired orientation for perfect composition. Once framed, you retighten the screws to lock it in place, all without changing the carefully set extension length.
How would I use the Baader VariLock 46 to achieve a 55mm back focus for my flattener?
The VariLock 46 provides a maximum length of 46mm. To achieve 55mm, you would combine it with a fixed T-2 extension ring. For example, you could add a 10mm fixed T-2 ring to your imaging train and then adjust the VariLock to exactly 45mm to dial in the perfect total spacing.
I'm imaging with a fast Newtonian and a Baader MPCC III coma corrector. Is the VariLock 46 a good tool for this?
Absolutely. Coma correctors like the Baader MPCC III have a very specific back focus distance required for optimal performance. The VariLock 46 is an ideal tool for this, as it allows you to adjust the camera spacing with sub-millimeter precision using its engraved scale, ensuring you get perfectly sharp stars across the entire field of view.
