2inch vs 1.25inch EPs

[darrellx (Darrell)]

Hi all

While reading through a recent astro mag from overseas, a question occurred to me - is there much of a difference (really!!) between 1.25inch and 2inch eyepieces for viewing or photography?

I only have 1.25inch ep's and my 400d and DMK21 only go into 1.25inch adaptors.

I suspect that the field of view may be a little larger, but I thought that was related to the ep itself (apparent FoV divided by mag).

So, I suppose I am really asking if it is worth the expense to get some 2inch ep's or an appropriate camera attachment.

Thanks
Darrell

[Starkler (Geoff)]

I believe someone asked this same question within the last week.
The search function on this site can answer many questions for you

[§AB]

Visually, the obvious difference is that:

2" eyepieces are generally offered in long focal lengths (>20mm) and are designed for low power, wide-field viewing while the 1.25" of comparable focal lengths offer narrower FOVs and are cheaper.

[darrellx (Darrell)]

Thanks. Found it. I couldn't see the forest for the trees!!

Darrell

[g__day (Matthew)]

I bought 30mm and 40mm 2" eyepieces from Andrews (plus minus violet filters when I use them in a 80mm WO refractor) - as said above, great for widefield views and the prices where very, very affordable!