Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Is this a solid (no vibrations) tripod for a Celestron Mak C90 mainlid used as a spotting scope?
Document: I just needed a tripod for the C90 Mak Spotting scope and this meets that need. As many other reviewers have noted, the only real issue is the elevation adjustment. It is just plain poor design. I do not know why Celestron didn't consider using some sort of locking mechanism that can be adjusted by hand. However, since I really won't be using it for too much astronomy ( I have a better scope for that), it serves my needs.
I've used this with my spotting scope and Celestron Mak90. Very solid, though it is a bit big even when collapsed.
All metal construction (except for the knobs) make this a solid mount for a small to medium sized scope. I found very little problem with vibration using a C90 spotting scope at high powers. The sliding 1/4-20 mounting screw allows the scope to be balanced properly. The 1/4-20 adapter also appears to be removable in order to use scope rings or other mounting methods.
This tripod was purchased to provide a stable platform for the Celestron C90 spotting scope with zoom eyepiece providing a 52x to 156x magnication. Placed in an apartment approximately 350 feet above street level, the scope needs to pitch (i.e. rotate front up/down) -45 degrees to +25 degrees. Moreover, the scope should remain extremely steady to observe small subjects.
I received my order of the Celestron Heavy-Duty Altazimuth Tripod today. I ordered this tripod as a base for my new Celestron C90mm Spotting Scope. I must say the the tripod is very sturdy in appearance and looks as though it will easily support the C90. However, there is one glaring omission in the package that I received..... there are absolutely no instructions on how to assemble the various parts of this tripod, or, instructions on how the tripod works.
I purchased the Celestron 52252 100mm Ultima Zoom Spotting Scope to put on top of this tripod. I couldn't be happier with both products. The tripod is rock solid, has good feet for grass, dirt, or concrete. The fine adjustment for azimuth and elevation make it easy to find the target and keep it locked on. I am extremely satisfied with this tripod at this price.
I have a Celestron C90 Mak and had tried to use a standard camera tripod for observations. It didn't work too well, because the planets are constantly moving and the telescope needs to be adjusted to &#34;follow&#34; what your looking at. This tripod fits the bill perfectly.
Surprised at how well made the tripod was. It is easy to assemble and use supports the Celestron  100mm Ultimate Spotting Scope with ease
I bought this tripod for my Celestron Ultima 100 spotting scope. It does a very good job for such equipment. It is very stable and sturdy, so there is no image vibration, even when zooming at 66X. I agree with other reviewers that you need to adjust initially the pretension for the elevation angle bolt (I did it with a wrench as someone suggested). After adjusting that, the control in elevation is very smooth.
This works well with the celestron 52252 100mm ultima zoom spotting scope, light weight and easy to assemble even if there were no instructions provided, the assembly parts are very easy to follow. I like that ...
Answer: I mounted a 650-1300mm lens with Camera on it and that was steady for me.  The lens is approx. 18 to 24 inches long.