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Feel the intensity, not your equipment. Maximum image quality. Minimum weight. The new ZEISS SFL, up to 30% less weight than comparable competitors.

Very Impressed by the Curio 7x21 (1 Viewer)

John A Roberts

Well-known member
Australia
Hi Jon (post #20),

The FOV is the field of view that's covered by the objective.
And the AFOV (Apparent FOV) is the FOV multiplied by the magnification.
So for the 10x25: 5.2° x 10 = 52° (and likewise with the 8x20: 6.5° x 8 = 52°).

As I indicated in my previous post, 52° is the nominal AFOV. The actual AFOV may vary from this for a couple of reasons
- but it's close enough as a starting point for rough comparisons.
Some manufacturers use a more complex ISO standard calculation, as shown here: Nikon | Sport Optics | Field of view
And the type and degree of geometric distortion can also influence the AFOV.

Where a manufacturer lists the FOV in degrees, they also typically list the AFOV in degrees
- I should have paid more attention to Leica only mentioning the former!


John
 

Jon555

Active member
United Kingdom
Hi Jon (post #20),

The FOV is the field of view that's covered by the objective.
And the AFOV (Apparent FOV) is the FOV multiplied by the magnification.
So for the 10x25: 5.2° x 10 = 52° (and likewise with the 8x20: 6.5° x 8 = 52°).

As I indicated in my previous post, 52° is the nominal AFOV. The actual AFOV may vary from this for a couple of reasons
- but it's close enough as a starting point for rough comparisons.
Some manufacturers use a more complex ISO standard calculation, as shown here: Nikon | Sport Optics | Field of view
And the type and degree of geometric distortion can also influence the AFOV.

Where a manufacturer lists the FOV in degrees, they also typically list the AFOV in degrees
- I should have paid more attention to Leica only mentioning the former!


John
Thank you!! Oh and yes, I belatedly remembered the FoV times the magnification as an approximation, but would have liked to see their claimed numbers as it's an odd thing to leave out. The VPs are 60 degrees for 8x and 10x (I wanted the 10x originally but changed to the 8x as easier to hold and very bright). I just like the feel of the wide view, others may just care about where the subject is in the centre (but those are easier to find with the former). Choices for all...
(The UltraVids were very nice to handle in use though... the Leica London people just let me take them outside, on my own, to look at stuff... you kinda just want to give your money to such nice people...)
I have Telescope eyepieces at 68, 72 and 82 degrees, which is partly why I like to see the AFOV quoted, as it is so easy to compare. Also I can bodge them into a spotting scope with a camera lens and a bunch of bits, or an actual small telescope (though some eyepieces are hand-grenade sized, so probably not a good choice). The attached is mostly lens hood BTW...
 

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Thotmosis

Well-known member
Netherlands
Yes. I have a number of other pocket bins as well. I got bit bad by the "pocket bin" Cobra a few years back. Good news is IMO there are reasonably useful and enjoyable pockets in the lower and mid price range.

Mike
Now that I think of it, it’s better to be bitten by the "pocket bin" Cobra than by a real Cobra😁and also pocket binoculars take less space.
 

NatureLvrCanada

Well-known member
I prefer to not drag around a full-sized bin anymore and have it hang around my neck. I became a pocket bin believer when I looked thru the CL 8x25 Compact. The glass is sharp and the price is very reasonable. I plan to get the Curio next spring. Looking forward to an even more compact size and wider FOV compared the the CL 8x25 Compact. I have read several reviews on the Curio 7x21 and all seem very favourable including yours.
 

samwise2010

Active member
Canada
I prefer to not drag around a full-sized bin anymore and have it hang around my neck. I became a pocket bin believer when I looked thru the CL 8x25 Compact. The glass is sharp and the price is very reasonable. I plan to get the Curio next spring. Looking forward to an even more compact size and wider FOV compared the the CL 8x25 Compact. I have read several reviews on the Curio 7x21 and all seem very favourable including yours.
Yes it’s great. Can’t believe the view that comes out of such a small package
 

Trinovid

mountain and glacier watcher
United States
Color me also impressed and it's been my constant companion ever since it showed up other day. Very happy with the feel, view, twist-up eyecups, rubberized barrels and diopter adjuster.

There are a few disappointments but all in all I'm really glad to finally have them.
97A16032-17ED-42E6-861A-1D4FD61DF5E6.jpeg
 
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moshc

Member
I had an issue with the Zeiss Victory Pocket 8x25 since I don't wear glasses and the eyecups don't extend far enough. Is this something that is better solved with the Curio for non glasses folks?
 

Trinovid

mountain and glacier watcher
United States
I had an issue with the Zeiss Victory Pocket 8x25 since I don't wear glasses and the eyecups don't extend far enough. Is this something that is better solved with the Curio for non glasses folks?
I don't wear glasses and they're pretty effortless to use. The twist-up eyecups are just one of my favorite features, along with the ease of eye alignment.
 

Dr. K

Bad Weather Birder
United States
I had an issue with the Zeiss Victory Pocket 8x25 since I don't wear glasses and the eyecups don't extend far enough. Is this something that is better solved with the Curio for non glasses folks?
I had that problem with the zeiss too but I added some eyecup extensions and they were suddenly unbelievable (Amazon.com : Acxico 2 pcs Rubber Eye Cover Guards Binocular Microscope Eyepiece Eye Cups for 32-35mm : Electronics). My dad fell in love with them and I let him have them, giving me a chance to try the curio. The curio are much better in terms of eye relief, but for me, they are still floaters. I can touch them to my brow but can't comfortably sink into them like I do my 8x32 EL or the zeiss vp 8x25 with add-on eyecups. I like the curio a lot, but, I have thought about offering it up as a trade for a Zeiss. The ergonomics of the zeiss are much better for my hands.
 

Wmugrad28

Member
United States
Hi,

Can someone provide LxWxH measurements of the Curio closed with the original rain guard and the eyecups extended? No strap. I am assuming the rain guard will make them larger in all three measurements. Thanks in advance!
 

Mono

Hi!
Staff member
Supporter
Europe
Can someone provide LxWxH measurements of the Curio closed with the original rain guard and the eyecups extended? No strap. I am assuming the rain guard will make them larger in all three measurements.
I make it 105mm x 64mm x 45mm
 

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