Review of Pentax Papilio 6.5x21 and 8.5x21
etc said:
Who makes such a beast? Ideally 6x24 or 6x20 or something similar.
Hope this helps--I have just ordered a pair of the Papilio 6.5x21 by Pentax along with a pair of the Nikon Superior E 8x32.
From Better View Desired--Review of Pentax Papilio (6.5x21 and 8.5x21)
Pentax has introduced two new ultra-close focusing binoculars designed for butterfly and dragonfly viewing. They just may be the coolest new optics to come along in a long time.
The limiting factor for close focusing binoculars is parallax. Binoculars produce two distinct images – one for each barrel. At normal distances the images overlap and our brain has little trouble merging them into a single image. At less than normal distances the two images don’t overlap and our brain cannot merge them so we see double. Most binocular designers mechanically limit the close focus to the closest distance at which the two images overlap. A few close focusing binoculars, like the Eagle Optics Platinum Ranger 8x32, permit very close focusing, accepting the double image at the closest focus as a reasonable (and unavoidable) compromise. The Eagle Optics has been my standard butterfly glass for several years and I have accepted the need to close one eye when focusing on an object at 3 feet.
Pentax has solved the parallax problem in a very clever way. They have incorporated the objective lenses into a solid housing rather than into separate barrels. The interpupillary distance (the distance between your eyes) is adjusted by moving the hinged eyepieces. The binocular focuses by moving the objective lenses in and out. The objectives move in two plains. As they are focused to closer distances the objectives move closer together allowing the images to overlap even at extremely close distances, while retaining binocular vision at ordinary distances. This solution virtually eliminates parallax problems -- even as close as 1.6 feet.
I have seen the Papilios for sale for $125, and was not expecting much from a binocular in this price range, but I found the optics to be amazingly good. I test binocular resolution by examining a dollar bill which I have pasted to a flat board. I rest the binoculars on a tripod, start at 15 feet, and then back up to 30 feet, and then 70 feet. When I tested the Papilios I started the test at the closest focus and then backed up to my standard testing distances. The Papilios showed detail at 1.6 feet that I had only seen through a loupe. Backing up to 70 feet showed the limitations of the Papilios, but the image was still quite acceptable -- keeping in mind that these binoculars were designed as a special purpose close focus instrument. The Papilio includes a fitting for attachment to a tripod. Mounting them on a table top tripod to examine a stationary object turns the Papilios into a field microscope of sorts.
Pentax has endowed the Papilio with the same “Pentabright” coatings, used on their more expensive binoculars, which makes them astonishingly bright. The colors seem very natural, and the contrast is very good. Looking at butterflies, dragonflies, and plants at very close range reveals worlds of detail that most of us have never seen. The eye plate and face of a dragonfly, and the detail of butterfly wings really come to life at very close distances.
I did use the Papilios for a day of birding. They do not show the detail and brightness that I expect from birding binoculars with larger objective lenses, but I was surprised to find the image to be quite acceptable. Color fringing is a bit better than average, and there is little edge distortion.
Pentax offers the Papilio in 6.5x21 and 8.5x21 configurations. I tested the 6.5x21 because I prefer the wider field of view (393 feet at 1,000 yards versus 315 feet for the 8.5x21) The eye relief is 15 mm and they worked well for me with eyeglasses. They have twist up and down solid eyecups. Weighing in at 10.2 ounces, the Papilios are virtually weightless and fit my hands quite well.
The Papilio is great fun. Pentax did everything right with these binoculars. The price makes it easy to justify buying a special purpose binocular, even for those of us who are only peripherally interested in bugs. Anyone interested in butterflies, dragonflies, or flowers should run out and buy a pair. I am not aware of anything comparable. They also work for birds. My wife and I plan to bring a pair of Papilios on our next European trip for church windows, architectural details, and museums.