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Nuttyboy72

Barlow lens

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Nuttyboy72

Hi , I’m looking for a decent Barlow lens & was wondering if you could give me some guidance .

 

I’m after it to go with the below 

 

celestron nexstar 8se 

Altair lightwave premium dielectric 2” SCT diagonal

Baader Hyperion eyepieces 


Skywatcher 102 goto 


Thanks 

 

Neil

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tuckstar

What kind of budget are you looking at. The televue power mate is arguably the best, but has a price to match.

Edited by tuckstar

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Bino-viewer

Although the Tele-vue option commands a high price (£312 for the 2x 2" for eg with the 1.25" at £207)

you can pick them up used for a lot less.

 

Generally expect to pay £175 - £200 for a used 2" 2x. I would say the 2" sets the benchmark for 'Barlow' performance.

As its a premium brand, they are usually very well cared for, and will hold their value well if you wish to sell it again further down the line.

I never have to wait long if i sell any Tele-vue item. They are always sought after.

 

One here here on UKAB/S

 

https://www.astrobuysell.com/uk/propview.php?view=157220

 

 

HTH, Rob 😀

Edited by Bino-viewer

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Bottletopburly

I used to have a Celestron omni 2x Barlow https://www.rothervalleyoptics.co.uk/celestron-omni-x2-barlow-lens-125.html that seemed fine to me I gave it to another member after buying a used  TAL 2x Barlow which is regarded as quite a good one tbh I thought it was on par with the Celestron  all depends on your budget .

Edited by Bottletopburly

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Ron Clarke

I also have a TAL 2x and 3x never had a problem but I don't do any Planetary at the moment..

Ron

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Bino-viewer
3 hours ago, Clive said:

Wow, at those prices you could get 2 or 3 shorter focal length eyepieces instead.

Well yes, but the OP may have those already. He may have a whole set of Hyperions ?

My recommendation towards a used Powermate may be just what he's after ? 

 

A lot of my Tele-vue stuff is second hand and there are some bargains out there.

He was after something decent Barlow wise and hasn't mentioned a budget......

 

 

 

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Nuttyboy72

Hi,

i was thinking up to £120-£150 could possibly save a bit more.

I’ve been looking at the Tele Vue 2x which is £121 I think from FLO &

Baader VIP Modular 2x Barlow Lens (1.25" and 2") £163 from FLO 

but not sue because I’ve only ever used the Barlow that came with my celestron lol

I do have the set of Hyperion’s 24mm - 5mm so was hoping for something that would compliment them . 
thanks for all the help & advice 

Neil

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tuckstar

If you have set of hyperions from 24 to 5mm why do you want a barlow? You'll get less defraction using fixed eyepiece and the hyperion has lots of eyerelief.

 

Also if you take the bottom element of the 21mm hyperion it become a 2" 32mm or there abouts. Just in case you didn't know.

Edited by tuckstar

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Nuttyboy72

Hi thanks for the info . I didn't know that about the 21mm EP .

I thought I needed a barlow to connect to my DSLR camera or my neximage 10 ? also I worked out that if I used a 2x barlow with one of my EP's I could hit the highest useful magnification of 480x lol 

is it better to use the Hyperion's as 2"  EP's ( I believe they can be used as 1.25 or 2") 

 

 

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Bottletopburly
2 hours ago, tuckstar said:

If you have set of hyperions from 24 to 5mm why do you want a barlow? You'll get less defraction using fixed eyepiece and the hyperion has lots of eyerelief.

 

Also if you take the bottom element of the 21mm hyperion it become a 2" 32mm or there abouts. Just in case you didn't know.

The 13mm can be used as a 2” 24mm and with a spacer ring a 8mm but can’t remember for definite the exact fl 

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Nuttyboy72

I've just noticed your in Ilkeston & district astronomical society tuckstar

I've been hoping to come to a meeting & join when i'm able to stand & walk without being in pain again , but it's taking some time still .

 

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tuckstar
1 hour ago, Nuttyboy72 said:

I've just noticed your in Ilkeston & district astronomical society tuckstar

I've been hoping to come to a meeting & join when i'm able to stand & walk without being in pain again , but it's taking some time still .

 

Just give me shout. You'd be more than welcome. We meet at Shipley park visitor centre second and last wednesday of the month.

 

1 hour ago, Bottletopburly said:

The 13mm can be used as a 2” 24mm and with a spacer ring a 8mm but can’t remember for definite the exact fl 

I had a chart with the different fls for each eyepiece with spacers but haven't seen it since I got the ES's.

 

Edit, found it!

2014-09-10-18-20-48

 

Edited by tuckstar

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