just a quick Q...pro's and con's of 1.25" & 2" EP's

[tingting44]

just wondering if there are any differences to 1.25" and 2" EP's? my 130p can take 2" but ive all ways used the 1.25" supplied EP's with it with the 1.25" adapter, there must be a reason other wise why make two different fittings?

[cantab]

The 2 inch format allows a wider true field of view. As such, you'll find long focal-length wide-angle eyepieces come in 2 inch fittings. The 2 inch format is also that much chunkier, a consideration for heavy eyepieces and if you're mounting a DSLR.

[alan potts]

As cantab says they afford wider FOV's, If you look at a 40mm 1 1/4 inch EP it will have a FOV of 43 degrees, the 2 inch versions of the eyepiece has as much as 68-72 degrees. However as much as I like these beware, they are often heavy and they cost a good deal more.

Alan.

[tingting44]

mhh thanks guys! i think 2" EP's are the way forward then. weight or size does not bother me but a bigger FOV is niceee thank you

Cantab the weight of the EP does not matter as i connect my dslr via prime focus so i dont use EP and DSLR at same time