Eye Relief

[FlashDrive (Poppy)]

Which ' pair ' of 1.25 eyepieces with at least (18mm to 22mm eye relief ) will suit a Bino-Viewer ( I have a Denkmeier Bino ) .

The Scope I'm using is a 102mm Lanthanum Doublet f/7

In the past I've used Pan TV 24mm and Pan TV 19mm excellent combo's.

But now they are expensive ... a pair of either of those would set me back $1k or 1.5k .

Suggestions please on a pair of reasonable quality 1.25 eyepiece...just remember they must ' fall ' between the eye relief stated above.

Preferred Eyepieces x 2 ..... would be 20mm to 30mm Focal Length.

TIA ....Col.

[Rainmaker (Matt)]

Denk 21mm LOA Neutral …..

[MortonH]

Do they need to be wide angle? I believe a lot of people use Plossls in binoviewers.

[FlashDrive (Poppy)]

Originally Posted by MortonH

Do they need to be wide angle? I believe a lot of people use Plossls in binoviewers.

No...not necessary to be Wide Angle.

Col...

[FlashDrive (Poppy)]

Originally Posted by Rainmaker

Denk 21mm LOA Neutral …..

Thanks Matt .....just need to find a pair of those....there's a set on eBay....way too expensive....


https://www.ebay.com.au/itm/12442880...8AAOSwVH1fpnos


Col....

[Dave882 (David)]

Explore scientific 68” 24mm go for a fairly reasonable price. 18.4mm eye relief.
From memory these provide just about the largest image circle possible with 1.25” barrel. Could add a 2x Barlow for planetary viewing too.

[FlashDrive (Poppy)]

Thanks Dave....

[Rainmaker (Matt)]

Originally Posted by FlashDrive

Thanks Matt .....just need to find a pair of those....there's a set on eBay....way too expensive....


https://www.ebay.com.au/itm/12442880...8AAOSwVH1fpnos


Col....

Not those Col, the D21 is different from the LOA21mm neutral.
https://www.denkmeier.com/product-pa...utral-eyepiece Only $149 each new (usd) I had them and found them very sharp

[FlashDrive (Poppy)]

Originally Posted by Rainmaker

Not those Col, the D21 is different from the LOA21mm neutral.
https://www.denkmeier.com/product-pa...utral-eyepiece Only $149 each new (usd) I had them and found them very sharp

Ahhhh....OK ....Thank You for the correction ...will definitely look at these.

Col...

[Don Pensack]

APM Ultra Flat Field 24mm will fit.
Quite compatible with glasses.
They are also sold under the following labels:
Altair Astro (UK) UltraFlat
APM Ultra Flat Field
Celestron Ultima Edge
Meade Series 5000 UHD
Orion Ultra Flat Field
Sky Rover Ultra Flat Field
Stella Lyra (FLO) Ultra Flat
Tecnosky UltraFlatField
Eye relief is 29mm, but the eye lens is recessed so much the effective eye relief is about 18mm.

[FlashDrive (Poppy)]

Thanks Don for this List ....

[Hoges (John)]

I've used the Baader Hyperion 21mm's in a binoviewer with excellent results. A little on the heavy side but worked well. Meade did a 26mm Super Plossl with a 60 degree field that was even better. I've also used the Saxon ED's too. All had around 20mm ER.

[Don Pensack]

The Meade Series 5000 26mm 60° Super Plössl became the Explore Scientific 26mm 62° and is still available today.
The field stop is 27.3mm, about as wide as a 1.25" eyepiece can be, but note that the edge will be vignetted in inexpensive binoviewers.