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sajmons / CollimationCircles

Collimation Circles is application for precise telescope collimation
https://www.saimons-astronomy.com/software/collimation-circles
GNU Lesser General Public License v3.0
40 stars 2 forks source link

Correction of camera chip offset? #2

Closed energiebrand closed 1 year ago

energiebrand commented 1 year ago

Hi, thanks for the next version of the collimator! I have published the new version in a German astro-forum. There is a user question about the comparison to the OCAL commercial collimator product. The OCAL gives the possibility to adjust a cameras offset if the chip is not installed in the center of its housing.

Does CollimationCircles have or will have such a feature? Don´t ask me how it is done, it`s just a question... ;-)

Cheers Hartmut

sajmons commented 1 year ago

Can you provide some documentation source describing that functionality so that I can check it?

energiebrand commented 1 year ago

Hi Simon, I found a manual in the web:http://www.ocalworld.com/en/PDF%E8%AF%B4%E6%98%8E%E4%B9%A6/OCAL%20Electronic%20Collimator%20user%27s%20Manual.pdf

This is first time I had a look into the manual and on page 33 I found some information. It seems that each individual hardware (camera) got a calibration code and with this code you have to correct the SW or better say identify the center of the individual chip.

So I think it is not possible from your side to add such a feature or maybe you have a clever idea to measure the center of each camera...? Question is, what "failure/offset" do we expect here and what influence will it have on the result...?

From my point of view this is not neccessary for your tool and I think not many astronomers have an OCAL but doing collimation just with a Cheshire and/or laser visually which is much less precise than using your free tool.

Cheers Hartmut

sajmons commented 1 year ago

It's my humble opinion that center of camera sensor does not affect telescope optical collimation in any way. Maybe I'm totaly wrong but it doesn't feels logical. My opinion is, that if camera sensor is off a little, this only means that final image will be offset a little too, but it should not have any effect to image quality. Please correct me if I'm wrong.

energiebrand commented 1 year ago

Hi, thanks for your feedback. I think you are right! Maybe it is only a marketing argument, a feature which should tell the customer that their product is perfect for collimation. But to be frank, it will only reach the last 0,001%. However that would require that my optical adjustment with my eyes is 100% perfect! So I think I will close this issue,... never was one, just a clarification :-)