127mm f/9.4 OTA Construction - 127mm f/9.4 Objective Lens (cell preparation)

 

The 127mm f/9.4 SurpluShed Objective cell is just shy of fitting the main tube, where sanding was needed to fix the issue... (Click for enlarged view)

 

After removing the objective for edge-blackening, it gave me the opportunity to prepare the cell to fit my 5" OD x .073" wall section of aluminum tubing, since it was not a perfect fit. I, as with many other SS 127mm scope ATMs have discovered, found the last 1.5" inches right up to the tube stop of the cell's interior was smaller in diameter than the main tube outside diameter. So, though I was able to get the cell to fit onto the main tube, it would not slide on all of the way to the tube stop rim. Therefore, a little elbow grease had to be administered in the form of sand paper. Several passes with the sand paper expanded the opening a bit and made for a very solid fit.