Here are a couple of snapshots of my new 10" f/6 Dob at various stages of construction (see here for a little about the mirror):
Quick snapshot with a Sony Mavica handheld to the eyepiece:
The various pieces: | |
Ground board and center bolt; teflon pads are directly above the feet; the center bolt fastens to a T-nut in the ground board and turns on a nylon bushing in the rocker bottom | |
EbonyStar and Teflon bearing material from CEO | |
Partially assembled rocker box; the addition of additional braces below GREATLY increased its stiffness | |
Inner side brace; screwed and glued to side and bottom | |
Outer side brace; screwed and glued to side and bottom | |
Cradle boards (fixed part of altitude bearings) | |
Altitude bearings and tube rings; lined with adhesive backed felt to protect the tube | |
12" ID Sonotube 67" long (price: one 12-pack of Henry's; thanks, Ed :-) | |
Bottom tube ring, mirror cell, collimation bolts | |
Assembled bottom tube ring and mirror cell; cell can be removed by taking out the bolts and rotating 60 degrees (rubber bands are temporary); fan will cover the hole | |
Collimation bolts have mayonaise jar tops on the heads and thread into T-nuts on the mirror cell | |
unaluminized mirror and top of cell; mirror will be attached with RTV on the bottom and the three posts | |
Coated Primary | |
Mirror - Cell attachment. There are also three big blobs of silicone glue between the back of the mirror and the cell | |
Collimation spot: a hole reinforcer painted black and carefully centered | |
Electronics | |
Nice quiet fan (to be installed on the back of the mirror cell) | |
ProtoStar spider and holder with integrated dew heater; CEO1.30" secondary mirror (1/20 wave!) | |
JMI NGF-DX1 2" dual speed Crayford focuser (not cheap and worth every penny!) | |
Top tube end ring | |
QuikFinder |