I've a C90 celestron spotting scope, 1250 mm of optical focus. I use it for astronomical view as well. Will this eyepiece work with it..??

a 2.3 give you over 500 power,a c90 can handle a max with good viewing about 180 power,take 1250 divide by mm of lens,how about a max of 6mm

Will the 2.3mm eye piece fit the astro master 130eq? Thx!

Basically no. It will "fit," but it will not be usable because it will be too much magnification. Magnification is your focal length of the scope (650mm) divided by focal length of eyepiece, so 650/2.3= 282 power. About 175 power would be max for that scope, but a 5mm at 130 power would probably be plenty. You'd likely get more use out of a 9mm for 72X

How does this compare with the Celestron Luminos for planetary viewing?

X-Cel LX have less light scatter and are better suited for planetary viewing. Luminos have better light transmission and wider field of view and as a result are better EPs for DSOs

re x-cel 25mm I have celesstron first scope 80 eq 900mm focal is this good for moon view Would I see whole moon or the craters well etc.? 80mm f/11

This eyepiece would provide 36 power through your scope, so you would be looking at the whole moon. To determine what power an eyepiece would provide divide the focal length of the telescope by the focal length of the eyepiece (900/25 = 36 magnification). I basically see the entire moon in my eyepieces up to about 90 to 100 power. Too see craters in more detail you need to have around 150 magnification or more so to accomplish this with your scope you need to have a 6mm eyepiece (900/6=150). Also your scope's theoretical maximum effective magnification is about 160 power, to determine the theoretical maximum of a telescope you take the aperture of your scope in inches 80mm is 3.15inches and multiply that by 50, therefore 3.15inches X 50 = 157.5 max power. The moon however is a big bright easy user friendly target so you might be able to get away with 200 power for looking at the moon but not anything else really, unless you get a scope with more aperture. So if you want to have a go at studying the craters a bit closer, to do that in your scope you could get a 9mm eyepiece that would give you 100 power and then use a 2X barlow lens that would double your magnification, but you may have a slightly cleaner image at 150 magnification. However, some say the multiplier for theoritical maximum magnification is 60 not 50 per inch of aperture which would put your telescopes max power at 189 instead of 157.5. Anyways I wouldn't try to anything beyond than 200 power through your scope. Hope this helps.

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Reviews

G**R

Quality

Well made, gives a nice bright view, thumbs up here.

14.11.2020

T**Y

Just what I needed.

Arrived this morning and looks awesome. Not tried it as the clouds are here. Full test soon as the sky is clear. I can't wait. Well built and good packaging.

1.09.2018

A**R

Great Value Eyepiece

"Exactly the same mag as a 10mm" says the other review. This comment is unintelligible and unfair to rate this product poorly on that. Aperture X 2 gives you the total magnification possible in your scope. Focal length divided by the eyepiece size will give you your apparent magnification. Whilst I do not have any other 6mm eyepieces to compare to, this works perfectly with my 900 scope giving me 150x magnification. The finish is of a high standard for an entry level eyepiece - there is some crowning which is not a huge issue if the image is properly aligned.

17.01.2014

G**.

Excellent value for money

Crystal Clear images of planets and moon details on a clear evening with the celestron 6Se and skywatcher 82ed refractor telescope eyepieces excellent quality for the price highly recommend these eyepieces

19.06.2022

T**Y

Got 100x magnification on our travelscope

We got this to increase the magnification of our celestron travel scope. We now get crisp detailed views of Saturn!

24.10.2020

T**I

this is so good

I love this so much if your a space nerd like me then you will love this 4mm

27.01.2024

S**S

Not a great experience (4mm)

(4mm) - Grab a piece of tin foil - Make a hole on it with a needle - Do your stargazing through this hole from now on (This would simulate eye relief, field of view and brightness well. There, I saved some money for you.) Right, in all seriousness: meh... I think the fidelity of the image is ok. Haven't had ideal viewing conditions to say for sure, but looks ok. Is it usable? Not really. Eye relief? You better trim your eyelashes! Literally, your eye will touch the lens every now and then! Field of view? Pretty bad. May be the eye relief, but looks narrower than any other Plossl I have. May give a slightly better image than my cheap chinese 9mm + my very reasonably priced achromatic barlow, but I'll chose that over this any time. It seems I have to look further for a planetary eyepiece.

8.03.2016

A**R

Telescope

Grandson more than happy with this so if he says good it has to be

25.01.2024

ASIN	B00008Y0S8
Best Sellers Rank	161 in Telescope Accessories
Brand	Celestron
Colour	black, silver
Customer Reviews	4.4 4.4 out of 5 stars (1,852)
Date First Available	2 Jan. 2007
Guaranteed software updates until	unknown
Item Weight	2.08 Ounces
Item model number	93317-CGL
Model year	2013
Package Dimensions L x W x H	10.6 x 4.6 x 4 centimetres
Package Weight	0.16 Kilograms
Part number	93317-CGL
Photo Filter Thread Size	32 Millimetres
Product Dimensions L x W x H	20.3 x 20.3 x 15.2 centimetres
Size	6 mm
Style	Single

Celestron 93317 Omni Series 1.25 inch / 6mm Eyepiece, Black/Silver

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