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Accurate or BS? |
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8shots
Optics Jedi Knight Lord Of The Flies Joined: March/14/2007 Location: South Africa Status: Offline Points: 6253 |
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So after copying and pasting all the above info, field of view is determined by the type of lens and magnification. (It has nothing to do with the objective size of the lens). The other variable is focal length. The shorter the focal length the larger the field of view. So generally speaking a short telescope would, due to its shorter focal length, have a wider field of view. However a manufacturer could built a long telescope and arrange the lenses in such a way that they have a short focal point and vice versa.
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brodeur272
Optics Journeyman Joined: September/23/2007 Location: United States Status: Offline Points: 609 |
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I was at a shop that had a vendor rep (will remain unnamed). I was looking at their mid line scope ballistic type reticle and it was a 1" tube. Just for s&*ts and grins, since I have more Euro 30 mm tubes, I asked him what the difference was between their top of the line 30 mms and the 1 in tubes.
His reply, "they transmit more light". I put his scope down, thanked him for his time and walked away. If the rep is that ignorant, I don;t need to buy their line of scope (although I had purchased 2 in years previous).
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brodeur272
Optics Journeyman Joined: September/23/2007 Location: United States Status: Offline Points: 609 |
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Oh John, that guy you're talking about must have switched companies...
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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He has worked for a couple of other European optics companies since leaving Swarovski. I would hate to tell you who he's working for now, because they make really good stuff!
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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I am always impressed with how little various sales reps typically know about the products they sell. To this day, I have NEVER seen a gun shop employee who knew anything about optics. A few people I have seen mounting optics in gun stores, had not clue what they were doing. Even roaming around SHOT show and asking question, you get a feeling that most reps have a hard time telling the difference between a scope and a baseball bat.
ILya |
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hunter12345
Optics Journeyman Joined: November/21/2007 Status: Offline Points: 470 |
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Wish I had experienced guys like you working for me
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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I know that sounded condescending. I did not mean it that way. However, I would really like a rep to answer "I do not know" BEFORE being painted into the corner. ILya |
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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ILya, I have experienced the same thing. I have even encountered employees of two well-known rifle companies that didn't know how to mount a scope, but thought they did. They essentially crushed scopes that they were mounting for me, to "save me time" when testing their company's rifles. Of course the scopes didn't work very well, so the rifles didn't come off looking great either! And I had to spend quite a bit of range and bench time figuring out what heck was wrong....
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Chris Farris II
TEAM SWFA - Admin MODERATOR Joined: August/13/2007 Location: United States Status: Offline Points: 3196 |
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Yeah we get that a lot with people mounting their own guns. People claiming the scope is defective and it will not hold zero. When we get the scope back we understand why they torqued the rings to 500 ft lbs. Lol. We have seen some scopes tubes literally crushed to where they aren't even similar to a circle anymore. I have heard various complaints from customers of "BIG NAMES" doing things like this. It's a shame.
Like they say if you can't cook stay out of the kitchen.
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One day your life will flash before your eyes; Make sure it's worth watching.
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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I once ran into a guy on the range who came over with his new rifle that the gunsmtih mounted a new scope on. I think it was a Leupold of some sort, and the guy was very proud of his new acquisition. It was his first nice scope. He looks through it a little bit and says that this whole "you get what you pay for" thing is BS. Then he starts mucking around with it and gets more and more pissed. I offered to look at it and he reluctantly agreed. I look through the scope and the image is an OVAL instead of a circle. Now that is something you do not see very often. I try to change the magnification... and I can't. It does not budge. So I start looking at it a bit more carefully. Turnes out that the rings (Weaver Grand Slam, if memory serves me right) were very out of spec and tightened to the point where the tube was both crushed and bent. I gave him a set of spare rings I had (some sort of cheap rings that I had in my range bag) and mounted the scope in them. Shot fine after that and magnificatino ring worked. ILya |
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pass-thru
Optics Apprentice Joined: February/20/2009 Location: Hubert NC Status: Offline Points: 109 |
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Question: what is the advantage of a 30mm tube over a 25mm tube it it does not improve light transmission?
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medic52
Optics Professional Joined: October/05/2006 Location: Missouri Status: Offline Points: 893 |
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Amazing at what some of the reps will tell you.... |
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"The true soldier fights not because he hates what is in front of him, but because he loves what is behind him." G.K. Chesterton
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John Barsness
Optics Optimist Joined: January/27/2009 Status: Offline Points: 785 |
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ILya--Yeah, have seen the "fixed-power variable" syndrome a few times myself!
Pass-thru--The big advantage of a 30mm (or larger) tube is extra adjustment range, but that also means that the optics can't be crammed inside the scope. There are some 30mm scopes with an erector tube so big that the adjustment range is even less than in a 1" scope from the same company.
The other advantage is strength. A larger diameter tube tends to be harder to bend, whether in a soda straw or a riflescope--IF everything else is equal, such as tube length and wall thickness. This is also why many larger scopes have 30mm or even larger diameter tubes.
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koshkin
MODERATOR Dark Lord of Optics Joined: June/15/2004 Location: United States Status: Offline Points: 13182 |
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As far as light transmission goes, there is no advantage to a 30mm tube vs 1".
As far as optical design goes, technically, when you ahve more space, there is more latitude in the design, and, if that is the design purpose, you can eek out better performance out of the 30mm tubed scope vs a 1" tube scope. The catch is that there is not way of knowing whether the optical system is any different in a bigger tube and whether the difference (if there is any) is noticeable to the human eye. In practical terms the biggest advantage, as John pointed out, is that the scope can be made stiffer and stronger simply because there is more space for beefing up the mechanics. ILya |
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