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resolution vs contrast

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 08:50
dsr View Drop Down
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Well we have all survived the holidays and the new year and are looking forward to a upcoming season of shooting new guns and our old ones with new accessories.   So the question I for you is what are your thoughts about resolution vs contrast and under what conditions would favor one over the other.  So let’s say you are designing scope and you have already set things like objective tube diameter turrets ect.  Which would you optimize for resolution or contrast and under what conditions of scope usage you favor one over the other?   

Thanks in advance - I look forward to your thoughts.

dsr
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 10:50
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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 13:32
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Tahqua,
 

I read that a long time ago. The question is what would you prefer contrast or resolution and would you switch your preference based on how you use your scope? Also after rereading Koshkin’s work again I should add sweet spot.

 

The purpose of this thread is to start a discussion about resolution and contrast.  The article composed by Koskin is excellent but somewhat “dry”. I am not saying it is bad.  In my opinion it (Koskin’s article and other similar one’s) does not help one choose which one to favor and under which conditions they should choose one over the other and under what circumstances of use would cause one to change his choice.

 

Hint: My leaving out the sweet spot is a hint to my scope usage.

 

 

dsr (I look forward to hearing what you would choose and why.)

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 14:06
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I will take a skew towards contrast. Most of the issues I have had involve poor lighting combined with mixed cover and poor weather. That makes the contrast more important for me. Sacrificing a small amount of resolution will not matter in good light in that regard.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 14:31
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I want a good compromise of both, but since you can't have both extreme resolution and extremely high contrast in the same optic, I'm willing to live with slightly compromised resolution to get slightly enhanced contrast, provided resolution is still very good.  Higher contrast allows me to find partially hidden game animals easier, and I just plain like the way the world looks with contrast amped up a notch.  I don't want such high contrast that significant detail is lost.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 14:55
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I agree with Contrast. If looking thru timber find your game it is the enhanced contrast that will help you out movement. The same with picking out a PD at long range and moderate to higher levels of mirage. The edge will go to the scope with higher contrast over resolution.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 15:05
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Tahqua and Rifle Dude and 3_tens,

Good answers now what about the other part under which usages or conditions would prefer resolution?

After being here for a while I was reevaluating my preferences in optical equipment and am looking what your inclinations are and interested how you use your scopes.   At the end of this thread I will tell you about my solutions and uses and reasons.

dsr (Hopefully this thread will help others understand and resolution and contrast)

Edited to add 3_tens



Edited by dsr - January/02/2012 at 15:13
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 15:28
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Higher resolution would be for paper target shooting. Normally done under better lighting conditions. IE Benchrest shooting. To me, you have to have better than average contrast to get good resolution. My definion of resolution may not be lab correct. Higher resolution has a very crisp image.

Edited by 3_tens - January/02/2012 at 15:32
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/02/2012 at 23:32
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A gentleman from Zeiss optics told me that a 56mm objective has better resolution than a 42mm.Why is that?

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/03/2012 at 01:09
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The theoretical limit of achievable resolution for an optical system is directly proportional to the aperture and inversely proportional to the wavelength.  All things being equal a scope with a larger objective lens can be made to show higher resolution.  In practical terms, theoretical resolution limits do not come into play with riflescopes all that much.

As far as the compromise between resolution, contrast and sweetspot goes, it depends on both the appication and on the specific user.  Different people prefer different things since we all have different eyes.

As far as the applications go: 
-hunters generally shoot at moderate distances but often in miserable lighting conditions and under time pressure.  They often lean toward high contrast
-Target shooters are trying to see tiny features and they lean toward resolution
-Law enforcement use also often involves short distance and bad lighting, hence contrast is a big deal there
-Military sniping use needs all three.  Overall they often want decent contrast, but excellent resolution and sweetspot.  For these people a riflescope often also serves as an observation device, so sweetspot comes into play.  Since you are often observing things very far away, resolution with decent contrast is key.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: January/06/2012 at 08:51
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I'm an oddball. I'll take all the resolution I can get. It helps me see the finer details of racks, and things in the poor lighting. Here's my disclaimer though. I suffer from a very slight touch of colorblindness, so a touch more resolution doesn't seem to help me a whole lot. Being able to count points while a buck has his head down in corn stalks is a big plus for me, and some resolution seems to help for that.
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