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What determines image size?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/28/2013 at 22:59
MBar308 View Drop Down
Optics GrassHopper
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I have looked through several scopes that have a large, "full" image with only a thin black ring around it. These include a 4-12x40 Vortex Diamondback, 4-12x40 Redfield Revolution, and a 2.8-10 Weaver 40/44.

I have also however looked through several scopes where the image appears small and distant with a thick black ring around the image.
These include a 2.5-10x44 Vortex Viper, 3-10x44 Mueller Sport Dot, 3-9x40 Nikon Prostaff, 4.5-14x40 Nikon Buckmaster.

My 3-9x40 Burris Fullfield II and Nitrex TR-One 4-16x50 seem to fall some where between the two extremes.

I initially thought it may have something to do with the erector ratio, but most of the scopes I listed are based on the 3x platform. Also, for the most part the scopes all fall within the same price range.

I'm looking to purchase a couple new scopes that are not available to look through locally and was just wondering if there is there a way to tell if the scope will exhibit tunnel vision or a full sized image without actually handling the scope.

Forgive me in advance for accidental ignorance and I look forward to hearing from you all.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 17:22
MBar308 View Drop Down
Optics GrassHopper
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Do you have any thoughts on this matter Koshkin?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 20:24
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Stay with Zeiss and you wont have to worry about that.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 20:39
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Optics GrassHopper
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I'd like to eventually try a Zeiss, but unfortunately it is not in the budget at the moment.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 21:18
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What if there was a way to do that like using the trade in form http://www.samplelist.com/TradeInForm.aspx and buying one off samplelist:
 
Stock # Product Description Price
SPL17166 Zeiss 1.1-4x24 Victory Varipoint Rifle Scope DEMO-B
Click to view 5217079960, Matte, Illuminated #60, 30mm
$1,399.95
SPL18035 Zeiss 1.2-5x36 Conquest Duralyt Rifle Scope DEMO-B
Click to view 5254019906, Dark Grey, #6, 30mm
$599.95
SPL18036 Zeiss 1.2-5x36 Conquest Duralyt Rifle Scope DEMO-B
Click to view 5254059960, Dark Grey, Illum #60, 30mm
$799.95
SPL18375 Zeiss 1.5-6x42 Divari Z Rifle Scope DEMO-B
Click to view Matte, 4A, 30mm
$999.95
SPL16315 Zeiss 1.5-6x42 Victory Varipoint iC Rifle Scope DEMO-B
Click to view 5217539960, Matte, Illuminated #60, Railmount
$1,499.95
SPL17555 Zeiss 2.5-10x50 Victory Diavari Rifle Scope DEMO-B
Click to view 5217339960, Matte, Illum #60, 30mm
$1,799.95
SPL17685 Zeiss 2.5-10x50 Victory Diavari Rifle Scope DEMO-B
Click to view 5217319904, Matte, #4, 30mm
$1,499.95
SPL18038 Zeiss 2-8x42 Conquest Duralyt Rifle Scope DEMO-B
Click to view 5254159960, Dark Grey, Illuminated #60, 30mm
$829.95
SPL18896 Zeiss 3.5-10x44 Conquest Rifle Scope DEMO-B
Click to view SOLD 5214249920, Silver, Z-Plex, 1"
$599.95
SPL19684 Zeiss 3.5-10x44 Conquest Rifle Scope DEMO-B
5214209920, Matte, Z-Plex, 1"
$459.95
SPL19685 Zeiss 3.5-10x44 Conquest Rifle Scope DEMO-B
5214209971, Matte, Rapid Z 600, 1"
$499.95
SPL19686 Zeiss 3.5-10x44 Conquest Rifle Scope DEMO-B<
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2013 at 23:31
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Optics GrassHopper
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You might want to give the SWFA SS 3-15x42 a look.

See a review here: http://www.opticstalk.com/review-swfa-ss-315x42-at-13-sniper-challenge_topic38917.html
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/01/2013 at 00:24
koshkin View Drop Down
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Dark Lord of Optics

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Originally posted by MBar308 MBar308 wrote:

Do you have any thoughts on this matter Koshkin?

As a matter of fact I do.  Generally, if you have a question for me, start a thread and shoot me a PM with a link.  Otherwise, I might miss it.

The overall imae size is strictly a function of eye relief and eyepiece diameter.  Your eye has a particular field of view and the more of your eye's FOV the eyepiece takes up the larger the image will look.

The presence/size of the black ring around the image is a function of the optical design of the eyepiece.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/04/2013 at 17:52
MBar308 View Drop Down
Optics GrassHopper
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Thanks for the links Urimaginaryfrnd. That 3-9 conquest would be an option with a trade in.

Thank you Koshkin, that's the kind of answer I was looking for!

So a larger ocular/eyepiece will provide a larger image size.

You mentioned eye relief...will more or less make the image appear larger?

Thank you again.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/04/2013 at 18:17
koshkin View Drop Down
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Dark Lord of Optics

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Originally posted by MBar308 MBar308 wrote:

Thanks for the links Urimaginaryfrnd. That 3-9 conquest would be an option with a trade in.

Thank you Koshkin, that's the kind of answer I was looking for!

So a larger ocular/eyepiece will provide a larger image size.

You mentioned eye relief...will more or less make the image appear larger?

Thank you again.

All other things being equal, shorter eyerelief makes the image appear larger.

ILya
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