Hi folks,

i already posted this on cloudynight, they pushed me here:
www.cloudynights.com/topic/795902-fov-ca...ation-in-ekoskstars/:

So the calculated FoV in Ekos/Kstars apears to be wrong.
I'm working with astroberry. Local and Remote Kstarts. CAmeras are Olympus and asi zwo 120, different optics (50mm, 90mm (FF) ) and a redcat 250mm
Maybe i just messed things up, but what ever i change the value is always of: 
Picutes are here: imgur.com/a/4AKdT6r 
Hope u guys can help me with that. 

best 
Sebastian

When it comes to DSLR lens, the FOV may be inaccurate, look at this bug report here: bugs.kde.org/show_bug.cgi?id=439221

However, for the Redcat, it should be fine. Which FOV is calculated wrong exactly?

The thread referes to fisheye lenses. The 50mm and the 90mm isn't a wide lens by any means.
The FoV from the redcat (250mm) is 5 times the fov from the 50mm. So the calculate Error is the same for both lenses.

EKos/KStars calculation:
50mm on the asi120mm = 330' x 247,5'
250mm on the asi120 = 66' x 49,5'

if i use www.12dstring.me.uk/fovcalc.php to calculate the values it get:

50mm on the asi120mm = 5.50x4,12'
250mm on the asi120mm = 1.10'x0,83'

These are the values i would expect.

When i calculate the Pixel Size back from the 330' on the 50mm i get 17 [?] for a pixelsize - Thats a huge sensor

Are you sure about the unit of measure on fovcalc? It would be equivalent to EKOS if it is arc-degrees... not arc-minutes.

EKOS numbers look correct.

Ron