I expected for there to be a noticeable difference in favor of the SF.
From what I saw yesterday at a trade show (no chance to use the binoculars outside, unfortunately), comparing the HT and the SF 8x42 for an hour or so side by side, I saw several differences:
- Clearly wider field of view of the SF, that's surprisingly obvious and makes a much bigger difference than I thought it would.
- Sharpness across the field of view, the SF is sharp to something like 95% of the field of view, the HT isn't.
- Very easy view, easier than in the HT. Especially the 8x42 is outstanding, but the SF 10x42 is also better than the HT 10x42 in my opinion.
- Some rolling ball in the SF 8x42, none in the 10x42. No rolling ball in the HT obviously. I wasn't bothered by it in the SF.
In the *centre* I couldn't see a difference in resolution and/or sharpness between the HT and the SF, but that's hardly surprising, given the quality of the HT. Both binoculars had equally high contrast to my eyes, and both had no problems viewing against the light (lots of bright lights there). When looking into shadowy areas of the roof I saw the same amount of detail. The better transmission values of the HT were *not* visible, at least I couldn't see any difference. Colour reproduction seemed very similar, but that's something you've really got to judge outside, in the field. I couldn't see any CA in either the SF or the HT.
Of course all of these observations will have to be validated in the field.
Other points I noticed:
- The focuser of the SFs I tried (10x42, 8x42, both production units) was extremely good: Very smooth, very "precise", no backlash, no play, no differences between the two directions. The focuser of the HTs was very good, the one of the SF was even better. The best focuser I've used so far, an excellent compromise between precision and speed.
- The ergonomics of the SF are great, the difference between it and the other roofs I know was quite obvious when handholding the bin for more than a minute or so. It *does* feel lighter than it is. That, coupled with its size, may even lead some people to say it doesn't feel very "solid".
- All the "problems" that have been noticed in some of the pre-production units are gone. The eyecups feel solid and work just fine. Zeiss obviously did some tweaking here and there, as was to be expected.
From what I saw yesterday I can see myself getting an SF 8x42 in the not too distant future.
Hermann