ovl hyperflex eye relief

[cajen2]

1 minute ago, globular said:

Possibly.  I'm struggling to convince myself to go for 50° EPs ... I'm looking for 60° ideally.  But I'm going round in circles at the moment. 🤪

BSTs then?

[globular]

Yeah I reckon I'll probably end up trying a pair or two of them to get me started... but the eye relief does worry me.... 16mm claimed is already tight... and I've seen reports they're only 13-15mm in reality.... 
And although they are pretty good in the centre I might not like the views at the edge.... so maybe the extra FOV will be more off putting and should get a 50° set after all.....

Like I say... circles.... 🤪 

[Louis D]

On 04/09/2020 at 21:11, John said:

I have the Aero ED 40mm and it is very good. Even in my F/5.3 12 inch dobsonian (not a scope which I use a 40mm often with) the Aero ED 40 shows good correction across most of the field of view

Well, it only took a couple of years, but Lacerta ordered a batch of the 40mm EDs (along with the 30mm EDs).  I picked up one before this batch sells out.  It competes very well with the 40mm Pentax XW while being lighter and slimmer, although a bit taller.  That, and it's quite a bit cheaper, too.

[Louis D]

1 hour ago, globular said:

Agreed.  I've measured my Hyperflex 7.2-21.5 as 38.3° @ 21.5mm and 56.5° @ 7.2mm.... as opposed to the claimed 40°-60°.

I haven't measured the eye relief.... but the claimed 15mm might be a but optimistic too.

My Surplus Shed zoom version has 33° AFOV @ 20.6mm (a bit short of 21.5mm) and 11mm of eye relief and 51° AFOV @ 7.4mm (again, a bit short of 7.2mm) and 10mm of eye relief.  Eye relief bottoms out at 9mm around the 12mm focal length.  If it weren't so stiff to zoom, I could probably live with it.  Since I only paid about $35 for it on sale, I'm not complaining too loudly.  It is pretty sharp, but being sharp over such a small AFOV isn't all that hard to achieve design-wise.

[Louis D]

The Hyperflex zoom has a narrow field of view even by zoom standards as seen in this post of mine:

 

[Don Pensack]

22 hours ago, globular said:

I agree it looks a lovely zoom for glasses wearers.  I'm a bit surprised at the price point though.  I guess with the hyped demand and limited supply it was inevitable. 

Brand new item.

No economy of scale, yet.

No amortization of the development costs yet.

Still less expensive than Nikon, Leica, Zeiss, and Swarovski Zooms.

[Paz]

I use slvs with binoviewers and find them to be very good. I need about 19mm eye relief with my glasses and they are good for that.