What the heck are you talking about i am talking about these 2 scopes and as far as i am concerned suggestions for the 180 are good
Skywatcher 180/2700 f15
Skywatcher 150/1800 f12
These 2 scopes are not both f15 which makes them different animals
a 35 panoptic in both scopes
180/2700 f15 ex pupil 2.33mm -77x mag-fov-0.88 deg
150/1800 f12 ex pupil 2.92mm -51x mag-fov-1.32 deg
Already said if you read it properly the properties of an eyepiece is so important and top shelf eyepieces give you this,Whether you have a 9'' Mak or not is irrelevant and cannot understand why you would throw that into the ring ,I am just trying to help someone out with a suggestion for an eyepiece which will marry well with the 180 Mak.....
Quote:
Originally Posted by Wavytone
Not true - I’ve had 2 SW 180 maks over 10 years, Bigjoe had one (I bought his a while back) and I’m now using a 9” f/13 mak.
Agreed I’ve resisted TV eyepieces and there are certainly some excellent choices in midrange and even budget pricing. Regardless of cost there are some aspects that remain important in the eyepieces - sharpness over the field, contrast, lack of ghosts and flare with bright objects, field curvature, lateral colour off axis and so-on.
The selection of eyepiece focal lengths however is primarily determined by the focal ratio of the scope, first and foremost. F/15 is f/15, regardless of aperture.
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