Why is their twilight factor 1/2 that of a 15x56 Swarovski?
What makes you think that?
Reading spec sheets from both binos. Are you a tract salesperson? 16.2 vs 29.9 you can google it . Hopefully it is a misprint because that is a good amount of difference.
The twilight factor is the square root of the product of the diameter of the objective lens and the magnifying power of the binocular. [For example, an 8x32 binocular would have a twilight factor of 16, and a 10x42 would have a twilight factor of 20.5.
However, in a modern binocular, performance in dim light depends more on the quality of the optical coatings than on the twilight factor formula. Good coatings can double the amount of light that gets through the binocular.
If you pick up an old binocular from the 40s, or a cheap, low-quality binocular, you'll see very poor performance in dim light. Then look through a modern, top-quality binocular with the same magnification and lens size, and see how much brighter and clearer the image is, despite the fact that both binoculars have the same twilight factor rating.
I know what Twilight Factor is and how it is calculated. So the quoted twilight factor on the Tract binos is 16+ vs 29+ for the Swaros. Like I said before if it is not a misprint then why such a big difference?
Common sense should tell you there can't possibly be that much disparity between the two. The Tract's Schott UHD glass is exceptionally good and wouldn't allow that. If you put a Swaro SLC HD and a Toric 8x42 side by side on a tripod you'll see very small differences.....picking nits so to speak, and you'll have to look long and hard to pick 'em out. I'd bet $$$ the same is true for the 15's.
Since I put up the link Tract has changed the Twilight Factor to 27+, so it was a misprint like I said earlier could have been the case.
Got a shipping notice today. Hopefully it arrives before the 4th!
I hope so too, the last time I sent a package to Canada the package ended up in London and got lost coming back across the pond. That's when I decided that I will NEVER pay for insurance again because the USPS made it very clear after several months that there is zero chance of collecting a dime.
I hope your experience goes much,much better !!!!!!!!!!!!!!!
I can't wait to read your review, my son has the 10x42's and we both think they are awesome, I have a couple rifle scopes from Tract and they are awesome as well
I got to spend a fair bit of time behind a set of these on Saturday. Spotting targets and shots at a rifle competition. Very impressive performance at any price, but especially given the Tract MSRP.
Originally Posted by Llama_Bob
I've seen more well-shot game lost with TSXs than any other premium bullet.
I got to spend a fair bit of time behind a set of these on Saturday. Spotting targets and shots at a rifle competition. Very impressive performance at any price, but especially given the Tract MSRP.
Haha, well Canada Post got the Toric here early, and Mr. Wrongside and I both spent some time looking through it at the match on Saturday. I’ll post a more in-depth review after spending more time with it, but so far the resolution, edge-to-edge clarity, colour, and contrast are all extremely impressive. I haven’t had a chance to test its low-light performance yet. Optically, the Toric 15x is excellent, so far. Eye relief and positioning are slightly finicky and the diopter adjustment isn’t perfectly positive, but I’d still give the user-friendliness and build quality a 9 out of 10. But again, this is very preliminary.
This week’s sheep hunt plans changed a bit and I’ll be taking the Geovid 10x instead, but I’ll take the Toric sheep, and likely elk, hunting over the next several weeks to give it a good workout. Will report back later.
Schott glass and Japanese, these perk my interest into possibly checking into them. I was a big fan of fujinon, really like the Vortex Razor UHD, both are product of Japan. They can easily rival the big 3 euro brands. Be curious to see what everyone thinks when they hit your guys' door. Im always looking to test new glass lol
Kique
Enrique O. Ramirez CLAN OF THE BORDER RATS - Member
"..faith is being sure of what you hope for and certain of what you do not see.." Hebrews 11:1
Schott glass and Japanese, these perk my interest into possibly checking into them. I was a big fan of fujinon, really like the Vortex Razor UHD, both are product of Japan. They can easily rival the big 3 euro brands. Be curious to see what everyone thinks when they hit your guys' door. Im always looking to test new glass lol
Kique
I love mine. Excellent clarity and resolution as well as exceptional low light ability
I got banned on another web site for a debate that happened on this site. That's a first
