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Magnifying the passion for nature. Zeiss Victory Harpia 95. New!

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Search: Posts Made By: henry link
Forum: Zeiss Yesterday, 14:44
Replies: 179
Views: 39,405
Posted By henry link
Thanks Lee. My apologies to Zeiss for ever having...

Thanks Lee. My apologies to Zeiss for ever having doubted them. ;)

Henry
Forum: Zeiss Thursday 21st June 2018, 21:13
Replies: 179
Views: 39,405
Posted By henry link
Excellent! Looking forward to it. Henry

Excellent! Looking forward to it.

Henry
Forum: Zeiss Thursday 21st June 2018, 19:32
Replies: 179
Views: 39,405
Posted By henry link
That could be, but how many reviewers measure the...

That could be, but how many reviewers measure the clear aperture?
Forum: Zeiss Thursday 21st June 2018, 18:03
Replies: 179
Views: 39,405
Posted By henry link
Hey Lee, If the scopes have been changed...

Hey Lee,

If the scopes have been changed wouldn't it make more sense to revise the exit pupil specs rather than dropping them completely?

Another less innocent explanation is that Zeiss came to...
Forum: Nikon Sunday 10th June 2018, 17:07
Replies: 13
Views: 682
Posted By henry link
I'll just add that the Aculon is a simple classic...

I'll just add that the Aculon is a simple classic design (cemented doublet objective lens, Porroprism, Erfle eyepiece). That 100 year old design has always been capable of producing a very sharp...
Forum: Kowa Friday 8th June 2018, 15:24
Replies: 28
Views: 922
Posted By henry link
Mostly I agree with Joachim. Lemons are certainly...

Mostly I agree with Joachim. Lemons are certainly to be avoided and star-testing is the best way to do that, but star-testing will also reveal that even among expensive spotting scopes cherries can...
Forum: Zeiss Thursday 7th June 2018, 15:46
Replies: 179
Views: 39,405
Posted By henry link
Piergiovanni, Good to hear that you'll be...

Piergiovanni,

Good to hear that you'll be getting a look at the Harpia. Here's my little wish list for information about the scope.

Firstly, since the design is so unusual I hope you can make some...
Forum: Kowa Sunday 3rd June 2018, 18:54
Replies: 28
Views: 922
Posted By henry link
This is a test of axial aberrations, so the star...

This is a test of axial aberrations, so the star should be centered. The most useful information comes from moving the focus from perfectly focused to between 2 and 6 diffraction rings out of focus...
Forum: Kowa Sunday 3rd June 2018, 12:41
Replies: 28
Views: 922
Posted By henry link
Kingfisher, Here's a link to an old thread about...

Kingfisher,

Here's a link to an old thread about an 883 specimen that had sharpness problems similar to the one you bought.

https://www.birdforum.net/showthread.php?t=125302

There are some star...
Forum: Kowa Saturday 2nd June 2018, 18:22
Replies: 28
Views: 922
Posted By henry link
I'm sorry to hear that, Kingfisher, but I'm...

I'm sorry to hear that, Kingfisher, but I'm afraid it's an all too familiar spotting scope story. Of the six Kowa 883s I've tested over the years two were lemons, two were better but in my opinion...
Forum: Zeiss Wednesday 23rd May 2018, 14:23
Replies: 14
Views: 659
Posted By henry link
Hi tenex, I haven't seen the 8x56 SLC, but from...

Hi tenex,

I haven't seen the 8x56 SLC, but from what I've heard I expect its off-axis astigmatism is better corrected than the FL and I expect its color accuracy is better just because it uses the...
Forum: Swarovski Monday 21st May 2018, 13:36
Replies: 100
Views: 5,019
Posted By henry link
The old narrow band Transmax two-layer coating...

The old narrow band Transmax two-layer coating from the 80s and 90s might have enhanced sharpness a little compared to the same binocular with broadband multi-coating, provided the binocular has...
Forum: Zeiss Monday 21st May 2018, 13:04
Replies: 14
Views: 659
Posted By henry link
The 8x54 HT looked so good to me on paper that I...

The 8x54 HT looked so good to me on paper that I thought it was going to be the replacement for my 8x56 FL. The one I tested was an extreme disappointment. The image problems were corroborated by...
Forum: Swarovski Monday 14th May 2018, 13:53
Replies: 10
Views: 517
Posted By henry link
There are several other boosters on the market...

There are several other boosters on the market (Zeiss, Opticron, Vortex) which have the advantage of being press-fits either into or around the binocular eyecup. They have adapters of different...
Forum: Binoculars Friday 11th May 2018, 17:41
Replies: 71
Views: 2,902
Posted By henry link
I think it's a surprisingly long distance. I...

I think it's a surprisingly long distance.

I just did some observing of overlapping fence posts through some neighbors' backyards with a tripod mounted Porro 8x and a roof 8x. I found that a fence...
Forum: Spotting Scopes & tripod/heads Friday 11th May 2018, 16:38
Replies: 6
Views: 545
Posted By henry link
I don't have any personal experience with this...

I don't have any personal experience with this scope, but it looks to me like a generic mid priced Chinese spotter.

Unlike APM's astronomical refractors there's no mention of the ED glass type,...
Forum: Spotting Scopes & tripod/heads Tuesday 8th May 2018, 15:09
Replies: 26
Views: 1,323
Posted By henry link
I've used various 76mm-92mm Televue, Takahashi...

I've used various 76mm-92mm Televue, Takahashi and Astro-Physics astronomical refractors as birding scopes over the last thirty years. I'm so accustomed to right and left being reversed that I only...
Forum: Leica Saturday 5th May 2018, 19:30
Replies: 48
Views: 1,808
Posted By henry link
I think you had it right the first time. Only the...

I think you had it right the first time. Only the first three elements of the eyepiece move for focusing. Moving the prism would have no effect on focus. The focusing knob moves the eyepiece lenses...
Forum: Leica Friday 4th May 2018, 21:59
Replies: 48
Views: 1,808
Posted By henry link
Another rather unlikely possibility for the roof...

Another rather unlikely possibility for the roof edge being more visible from the front in the early Trinovids just occurred to me. The Uppendahl prism can be installed in two ways. One way is with...
Forum: Leica Friday 4th May 2018, 18:03
Replies: 48
Views: 1,808
Posted By henry link
I can't tell for certain, but the two closely...

I can't tell for certain, but the two closely spaced reflections might be coming from the internal surfaces of an air spaced doublet. Could be that the fourth reflection isn't showing at the angle...
Forum: Leica Friday 4th May 2018, 11:21
Replies: 48
Views: 1,808
Posted By henry link
Only two explanations occur to me for the visible...

Only two explanations occur to me for the visible diagonal line in the early 8x32. One is that the early prisms were made to a lower specification than later ones. The other is that the objective...
Forum: Leica Wednesday 2nd May 2018, 22:11
Replies: 48
Views: 1,808
Posted By henry link
Welcome to Birdforum! I think we can be quite...

Welcome to Birdforum!

I think we can be quite certain that Uppendahl prisms were used in both early and late Leitz Trinovids. Here's a link to an ad for an old Leitz brochure with an internal view...
Forum: Spotting Scopes & tripod/heads Wednesday 2nd May 2018, 17:19
Replies: 38
Views: 2,202
Posted By henry link
I've always used relatively heavy astronomical...

I've always used relatively heavy astronomical scopes for birding, so even the biggest spotters seem like featherweights to me. The two scopes I use most of the time now weigh 8lbs 9oz (Astrophysics...
Forum: Leica Tuesday 1st May 2018, 15:28
Replies: 28
Views: 1,715
Posted By henry link
I think the English phrase "sample variation" is...

I think the English phrase "sample variation" is probably what you're looking for when you use the phrase "series dispersion". I agree that this is something that is subject to sample variation....
Forum: Binoculars Monday 30th April 2018, 15:55
Replies: 70
Views: 4,066
Posted By henry link
Flat spots along the exit pupil edge come from...

Flat spots along the exit pupil edge come from straight prism edges intruding into the clear aperture. It can happen if the prisms are undersized or if the eye's pupil is not centered well with the...
Showing results 1 to 25 of 1000
 


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