View Single Post
  #19  
Old 09-02-2011, 08:39 PM
Suzy's Avatar
Suzy
Searching for Travolta...

Suzy is offline
 
Join Date: Jan 2010
Location: Brisbane, Australia.
Posts: 3,700
Thank you all for your input so far. I have been doing a lot reading on everything all of you'll have suggested.

John B, I feel priveledged to have you comment on my thread - thank you. I have taken notice & listened to your advice in the past which is why I ended up with my XW & LVW.

I realise of course I won't get everything I'm after in the one eye piece and will have to make a compromise somewhere- whether it be fov or eye relief. Logic tells me eye relief is more important than fov. Ultimately, one needs comfort at the eyepiece. My eyes are slowly going long sighted and for that reason, my other premium eye pieces have 20mm eye relief to factor this in for the future when I may need to have my glasses on.

I would also prefer a 14mm focal length. I think the 13mm is too close to my 10mm. I also want to barlow down to 7mm, as I find this focal lenghth hits the sweet spot on planets before conditions start to interfere.

Here is what I've summarised so far...

Denkmeir
I have sent Frontier Optics an email for a price of the Denk. I have no clue where to look for them overseas or how much they are there. They seem the same specs as the LVW (20mm eye relief, 65 fov). However, the Denks come in a 14mm (which is what I'm after), and the LVW in a 13mm.

Explore Scientific
900 g ? Seriously?
So I weighed my heaviest ep - the XW. It comes in at 403g. I then weighed it with the barlow on (as I often used it barlowed without any problem). That comes in totaled at 800g. I can manage the extra 100g - (just!) without it being a major issue on my 10" dob. However, there is no way known I would even dream of throwing a barlow on. That would make its total weight 1kg 300g. Plain ridiculous . And there goes my non usable focal length of 7mm. Plus, it has 9 elements, whoa that's a lot of glass isn't it?!

Nagler T/6 13mm
The 13mm of eye relief concerns me. Also the CN review says
Quote:
However, the small eye-lens and shorter eye relief of the 13T6 limited its potential to easily take advantage of the full 82 degrees. Thus, the difference in field of view between the two eyepieces was not as significant as one might initially expect, and the D14 was certainly very engaging in this regard. The longer eye relief of the D14 also enabled more comfortable viewing.
With the 20% sale at the moment they are $268 from Bintel. Making them cheaper than buying overseas and paying freight.

I would welcome some comments on the eye relief, particularly people that are wearing glasses at this ep, and also with respect to what CN said in the review (regarding fov).

Baader Hyperion 13mm
Chris has been the only one that has given any input on this. I just could never see the Baader's as being classed as premium. I wonder if I'm an eyepiece snob

And to throw another eye piece into the works..
I find my 22mm Vixen LVW sharp to the edges with pin point stars. A big ask at that f/length. I would imagine if it performs this well at 22mm, 13mm should be just as good.

BUT... it seems I can only get a 14mm in the Denk.

Please answer....
Is 13mm too close to my 10mm? My next length is 22mm. Or not much difference between 14 to 13. Help. I'm thinking I need the 14mm.
I want to use this f/length to search for galaxies and planetary nebs. And when the 10mm is affected by seeing (on stars).

I am incredibly grateful to everyones help so far. Thank you.
Reply With Quote