Posts Made By: Rod Kaufman

Originally Posted by Kenzie Young

Is the 28mm Edmund Scientific RKE the only one in the series to demonstrate the legendary "floating in space" effect? How about the 21mm? Are there other eyepieces that display this?

Originally Posted by Wayne Yaskew

I have a 2" diagonal on my CPC 925. I have 2 Baader Morpheus eyepieces (12.5 & 17 both with 1.25 barrel) I have one low-end ocular that came with the scope (40mm Plossl) I own 1 Televue; (Panoptic 41mm) and I want to add one more good eyepiece in the $500-$600 maximum range. I see Ethos 21mm going used in the neighborhood. I of course want to go 2" 

What is the one eyepiece I should own (my preference being deep sky objects) and I am not into photography of any type.

Suggestions?

W

Originally Posted by Wayne Yaskew

Hey John,
I am in a fairly small community and it’s virtually impossible for me to try out different eye pieces before I buy.
In fact my dealer is 800 miles away in Alberta. I’m just trying to get opinions from other enthusiasts as to what’s the best pick for me might be taking into account what I already have in my collection.
I’ve been told the low power I pieces play eyepieces, say 7mm or even 9mm will just result into much blur taking into account by scope (C925) and conditions.

I’d like to fill the gap between 21 and 31. What would you suggest? I’m OK with the cost of say a Tele Vue. I just don’t want to pick the wrong one or a redundant one

Originally Posted by Vladimir Portyanko

Here is a good recommendation from Don Pensack (post #3)

http://www.deepskyforum.com/showthread.php?1081-Filters-and-band-pass-scanning

You also may want to download his 2019 Nebula Filters Buyer's Guide unless you've got it already

https://www.cloudynights.com/topic/655490-2019-nebula-filters-buyers-guide/

And specifically on Svbony OIII more details here

https://www.cloudynights.com/topic/666442-svbony-oiii/

 

Originally Posted by tom sweet

Hello,

Can anyone tell me the difference between the early and late version of the explorer scientific 82 eyepieces?  Also how can you tell the difference by looking at them?  I appreciate any help you can provide as I’m looking at buying some used eyepieces.

Thanks, Tom

Originally Posted by Henrik Bjørslev Andersen

Hello, recently I made some comparisons of various EPs in my binoviewer and found out that TS UWAN 16mm is not 16mm at all!! It's exactly 14mm, I can place an ES14 in one side and a TS UWAN 16mm in the other side and get a sharp image, they give exactly the same enlargement. The UWAN has a slightly wider field though. I find it amazing that such an eyepiece can be manufactured for years with so misleading specs, why hasn't it been changed? Many people must have detected that before me!

Now I wonder, if UWANs from other manufacturers than TS Optics have the same problem? Nirvana, Lacerta and others look exactly the same, I suppose they are identical, just with different brand names. But the UWANs from Williams Optics look different. Does anyone have experience with these, are they any better than TS UWANs, which have a tendency for blackouts, if you want to see the complete field, and are they actually 16mm or 14mm as the others?

Thanks for your time,
Henrik.

Originally Posted by James Erwin

Why are Tele Vue Ethos eyepieces often recommended in groups of three focal lengths:

21mm, 13mm and 8mm

or

17mm, 10 and 6 mm?