I've just purchased the CR4 in blue with the tri-knob and filter swing for the 24"....can't wait!
Stats....
1.45" low profile, Zero backlash, No image shift crayford design.
2" travel. Draw tube length is 3.6" with the filter holder.
Swing filter holder is threaded for both 48 and 49 mm filters and is operated by an above board lever mounted to the draw tube.
Racked down heigth is 1.45" , max racked up heigth is 3.45"
Vertical lifting capacity is 8 lbs. and is user adjustable for even greater capacity if needed.
Super smooth focus rate is .58" per revolution on standard side.
Inline slow motion has an 8.2 to 1 ratio.
Flat base dimensions are L=3.5" W=2.9" H=1.45"
Weight: 16.6 ounces.
Tip/tilt focuser alignment screws located in each corner of the base.
Sealed precision stainless steel bearings with lithium grease.
Base is highly polished, red anodized 6061 aluminum.
Draw tube, and adapter is highly polished, black anodized 6061 aluminum. (The flat on the draw tube is hand polished perfectly smooth which is why our focusers are so smooth-- No machine marks are left on the draw tubes' machined flat surface. This allows very small focus adjustments to be made without any sticky or notchy feel to the user.)
Knobs are 1" knurled 2024 polished aluminum.
All hardware is stainless steel.
Thumb screws are black nylon.
Here are a few close up shots of the focuser, it arrived yesterday.
It's a beautiful piece of engineering. I would recommend it to anyone.
I was to late when I asked if I could get the locking nob with it it had already been shipped. I don't think it would be a problem considering that I won't be doing to much imaging with it anyway.
