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Tasco Off Trail 8x25 or Tasco Sierra 8x25

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Tasco Off Trail 8x25 or Tasco Sierra 8x25

Postby GYS on Fri May 27, 2011 9:54 pm

Hi,

I'm trying to choose between the Tasco Off Trail 8x25 and the Tasco Sierra 8x25. Which would be the better choice in a compact binocular?

I've read that the Sierra uses Bak4 prisms while I don't have any idea on what type of prism the Off Trail uses. Will it also have Bak4 prisms due to it's higher price than the Sierra? Will the higher price of the Off Trail mean it will have brighter and sharper images than the Sierra regardless of what type of prism it actually has?

Does the Off Trail's single hinge design give it an advantage over the Sierra's dual hinge design?

I'm also a bit concerned about the rubber armor on both models. From the comments I've read about rubber armors they seem to have the tendency to turn brittle or sticky in a short period of time. Is this common in binoculars? If the rubber armor does deteriorate can it easily be removed without damaging the binoculars and will removing it affect the binocular's function and waterproofing/fogproofing?
GYS
 
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Re: Tasco Off Trail 8x25 or Tasco Sierra 8x25

Postby Jne_K on Sun May 29, 2011 6:57 pm

Hi

There will be no significant difference in optics on these two, regardless of prism glass used. A little advertised fact is the prism glass in roof prism binoculars is actually irrelevant. Bak-4 vs BK7 is actually an issue only in porro prisms.

The slightly higher price of the Offtrail is compliments of its open bridge design, which is more expensive to produce than a conventional bridge design. That open bridge may or may not improve handling for you, de[ending on how the binoculars fit your hands, but, of course, you won't get to fold them up as compact as the double hinge Sierra. Keep in mind that, in this price range, double hinge binos often work loose, quickly. For the sake of mechanical reliability, I'd probably go with the less compact Offtrail.
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Re: Tasco Off Trail 8x25 or Tasco Sierra 8x25

Postby Guest on Mon May 30, 2011 7:22 pm

Thanks for your reply.

Will there be a significant difference between the Tasco Off Trail 8x25 and the Carson Raven 8x26? The Carson Raven also has a very similar open bridge design but has a slightly larger 26mm objective lens, Bak-4 prisms, and is fully multi-coated. The Off Trail is only multi-coated. The Raven also has almost double the list price of the Tasco Off Trail. Will the Carson Raven have brighter and sharper images than the Off Trail and will it be more durable?

I've also read that given the same price range porro prism designs are superior to roof prisms. Does this mean that the Carson 8x22mm Scout Binoculars with it's smaller objective lenses, Bk7 prisms, and fully coated lenses will perform just as well optically as the Off Trail or even the Carson Raven?
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Re: Tasco Off Trail 8x25 or Tasco Sierra 8x25

Postby Jne_K on Tue May 31, 2011 8:06 am

Hi

Yes, slightly brighter images and I do mean slightly and something you are likely to notice only on cloudy days or in shadows. The difference between a 25mm and 26mm objective is insignificant. The difference between multi-coated and fully multi-coated, here, will make only a slight difference. On the other hand, spending more will get also get you a better binocular in terms of construction. $20 class binoculars are essentially disposable binoculars. At around $50 you at least get some expectations for durability.
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