Why the size difference between similar scopes?
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All Springer/NP/PCP Air Gun Discussion General
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Scopes And Optics Gate
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uncle paulie
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Why the size difference between similar scopes?
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Topic: Why the size difference between similar scopes? (Read 357 times))
RuberAlonzo
Shooter
Posts: 2
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Real Name: Ruben
Why the size difference between similar scopes?
«
on:
December 15, 2021, 02:54:57 PM »
Greetings Everyone and Merry Christmas & Happy New Year's. My wife recently bought me a Crosman Optimus .22 air rifle which came bundled with a Cross Point 4×32 (the scope on bottom right). As I was initially going to purchase a crossbow, I bought a Cross Point 4×32 (the scope on the left), BUT, the size difference is very apparent. The air rifle scope is a good 30% longer, even though the crossbow scope has an additional parallax adjustment screw? As you can see below, the crossbow is on the left and the air rifle scope on the right. I am wondering why such a big difference in size for seemingly the same scope? I own both of these and I would like to know how a scope with the same magnification but LESS features is longer the the other? Thanks for reading.
«
Last Edit: December 15, 2021, 02:58:16 PM by RuberAlonzo
»
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USA, TX, Laredo
Bayman
GTA Senior Contributor
Posts: 4839
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Real Name: Ron
Re: Why the size difference between similar scopes?
«
Reply #1 on:
December 15, 2021, 04:09:43 PM »
I have always wondered the same thing. I have hunches but no proof behind them. I'm following this, eagerly awaiting the explanation.
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USA,
Hw30- .177- Vortek PG2, Tech sights
Hw30 Laminate- .177- Vortek PG2, Hawke
Airmax 2-7x32 AO.
Hw30-.177 Vortek PG3 steel, Hawke Vantage IR 2-7x32 AO
Hw50- .177- Vortek PG3, Hawke 4X non A/O
Hw95- .177- Vortek PG2, Hawke Airmax 3-9x40
R9 SE (Blue Laminate stock) - 0.020- Vortek PG4, Hawke Airmax 3-9x40 AO
Hw97SE (Green 77 Laminate stock)-.177 Vortek PG3, Hawke 4-12x40 Airmax
R1-.177 now 0.22 - Vortek Pg4, Hawke Airmax 3-9x40 AO
Hw95 Field Pro 0.22 custom Vortek kit, Hawke Airmax 3-9x40 AO
Hw98 0.20 Hawke Airmax 3-9x40 AO
P1- 0.20 now .177
lefteyeshot
without hope, without fear
GTA Senior Contributor
Posts: 7003
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Real Name: Tim
Re: Why the size difference between similar scopes?
«
Reply #2 on:
December 15, 2021, 05:43:15 PM »
The two scope are Center Point. The extra adjustment knob is where the 2032 battery goes for the illuminated reticle or cross hairs. You'll need the longer scope for the Optimus to get good eye relief. You would need an offset mount to get the shorter scope close enough to you eye for a good clear picture.
They can design them different lengths by changing the shape , size and distance between lens. Also they can make pistol and scout scope for longer eye relief. With regular scope like the ones you have eye relief is 2-3 inches. On a scout scope 8-10 inches and a pistol scope 12 to 15 inch from the eye to get a clear picture. They are designed that way by using different shape lens in different distances from each other.
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GTA
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All Springer/NP/PCP Air Gun Discussion General
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Scopes And Optics Gate
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uncle paulie
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Why the size difference between similar scopes?