. Yes Gijs,
The 16×56 Hensoldt is indeed an amazing binocular. Amazingly light and in my experience almost unequalled resolution. The quality of the optical workmanship seems better than anything made nowadays.
I was not aware that it is called a Tele-Dialyt, thanks for telling me that.
If I may ask, how does a non-phase coated roof achieve such high resolution? I thought that would be quite impossible with the phase shift.
If I may ask, how does a non-phase coated roof achieve such high resolution? I thought that would be quite impossible with the phase shift.
Speaking strictly from a technical POV, oversized prisms and using other elements
to compensate could cover that. Not without trading off some other properties,
though. The phase-coating just beats one kind of trouble at the source (still the best
way if money is to be thrown). Going oversize can be used to alter the angles,
but the barrels swell up and get heavier..
Binocular tweeking at the high end is amazing these days..
Holger Merlitz makes an observation similar to Binastro's in regard to the Hensoldt Dialyt's 10X50 center of field resolution: "Image sharpness: The central resolution of all three binoculars is fine enough so that stars are imaged as proper point-like structures. It may well be the case that a most critical investigation using resolution charts would reveal a certain deficiency of resolution with the Dialyt as a result of a missing phase-shift correction coating (which was invented in the late 1980s only), and it might be that ambitious bird watchers were able to see the difference to Zeiss or Ross (which, being of Porro design, do not suffer from such a phase shift). In my field tests and without using resolution charts I was unable to make out any significant difference in center resolution..." (see http://www.holgermerlitz.de/ross10x50.html )If I may ask, how does a non-phase coated roof achieve such high resolution? I thought that would be quite impossible with the phase shift.
If I may ask, how does a non-phase coated roof achieve such high resolution? I thought that would be quite impossible with the phase shift.
Steve - I would like your opinion on the Canon 7x35 once you have used them. They tend to have stiff focusing - but that can be fixed. One nice thing about them, if you wear glasses is this. Removing the eye cup, you will find a nice flat surface which accommodates my 3 M sticky back rubbery flat rings. I use a set of leather round punches to punch out donuts to fit the older binoculars. This way I can usually get the full field of view and still keep from scratching my eye glasses. The Canon coatings create a rich color to my eyes. I have found the image to be superior to the old B&Lsm and those are pretty darn good. s Canon's 7x50s are also quite good, but I have found their 8x30s not so good. The 7x35 are really solid. No cheap materials in these old binoculars. John