Grab the draw tube and see how much you can rotate/move it. From my lousy experience with the Tak focusers, my 0.02c is it‘s that. There’s nothing with better optics at its size and below. I just don't want to give up my OAG as it allows me to plug and play all 3 of my refractors literally in a few minutes. Everytime I change the imaging train I have to rotate the OAG and camera to keep it orthogonal (more or less) to the RA and DEC axes so that I know what to adjust. I have to follow up on the grub screw issue. Right now, I'm thinking that there is something wrong with the focuser itself.
Free hocus focus puzzles software#
PM me if you want to do any testing - I have two systems and frankly I'm as interesting in understanding the NINA software as taking another picture of M31. If you have a Teamviewer account and want to stay up late you can even jockey the system yourself once I get a proper target (it will be pretty late if you are in NYC). If we have clear skies tonight I'll be imaging from home. I have time this afternoon to go over the HF video again and play with the settings so that I know what I'm doing better. I wanted to do that last night but I decided to tackle the tilt issue while I was on site. I'll have to find a telescope that's easier to set up, I guesss. 8" of travel granted to me by my NiteCrawler focuser rotator, I just need for the focal point to be within the travel of the focuser. So, to get the spacing correct, you can't just move the focuser back and forth as that does NOT change the critical spacing. If I understand Rod's comment, the issue is that the focuser is in front of the flattener. I have no way to adjust 10 microns of backfocus. Second,despite what George said (and he should know) putting in the step size at 1.1microns (which is correct from the OPTEC website) the variations in back focus WERE shown in microns. The instructions say to look in the "Focus Tab". First of all I had one run fail for no discernible reason.
I don't have room for a tilt adjuster as I use an OAG which eats up about 13mm of the 58mm back focus that's used in these subs. I think that there is tilt more than anything else but where's it's coming from is a mystery. Here's a link to them if anyone in interested in looking. There's not enough back focus for my OAG as well as a tilt adjuster.Įventually I just more or less gave up and took a couple of hours of subs on M31 to see what it would look like. Eccentricity and tilt varied between exposures whether the system was moved or not.I pulled everything off 4 times and used different spacer combinations to see if I could figure out where the tilt was coming from, but I never actually was able to.
No two HF runs produced the same numbers. Perhaps I have a fundamental misunderstanding of the OP's problem or, much worse, i have a serious misunderstanding of back focus and the system I soon (hopefully) will be setting up for myself. With a CFZ of somewhere between 20 microns and 50 microns (classic CFZ or Gold CFZ), I should have plenty of room to find focus and to account for filter offsets. I will, therefore, "zero" focus at approximately 260 microns behind the focal plane. Therefore, instead of an even 6,350 microns of focus travel in front of and behind the sensor, I will have only 6,090 microns of focus travel behind the sensor and 6,610 microns in front of the sensor. My imaging train places my sensor about 0.26mm (260 microns) too long, i.e., my sensor will set up about 260 microns behind the focal plane.
In my case, my total available focus travel is about 1/2" or 12,700 microns. I thought that if I know that, then I just need to know that I have enough focus travel on either side of the sensor location so that I can be assured of my ability to achieve focus. Why does one need to have their sensor exactly at the focal plane? I have been working with the presumption that I just need to know where my sensor is relative to the focal plane. So please forgive my apparent ignorance of what issue the OP is attempting to resolve. Therefore, I am in an extreme learning mode, sans a telescope or a focuser, etc. yet and, as I await all of my imaging train components, I have been "gaming" my adoption of N.I.N.A.
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