Eyes are not as good as they used to be

Discussion in 'Scopes, Optics, LRFs, Spotters, BoreScopes' started by Edward, Jun 7, 2019.

  1. Edward

    Edward

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    I have a Leupold 45x 1 inch tube Will there be any improvement if I replace it with a Sightron 10x50 30mm tube Another thought is there an eyeglass prescription I can tell my optometrist that will improve my "scope vision"
     
  2. Turbulent Turtle

    Turbulent Turtle F-TR competitor

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    Where to begin?

    First off, the Leupold you have is a 45X45 fixed power. I had to go to the Leupold site to dig up the name. It has a 45mm objective lens, 38MOA of adjustment range and an exit pupil diameter of 1mm (45/45), which means you have to be positioned very properly behind it to get the full picture and it's probably darkish on overcast days or early morning, late afternoon settings.

    Second, you did not say which Sightron you are considering. Since there is no 10X50 model, I figured you probably meant 10-50X something model. There is indeed an SVSSED 10-50X60. It has a 60mm objective lens and 70MOA of adjustment range but it has a 34mm tube and you said the one you're looking at has a 30mm tube. So I went looking for other ones and found a SIIISS 10-50X60 scope with a 30mm tube. It has a 60mm objective and 50MOA of elevation thanks to its larger 30mm tube. If you set it at 45X to match the Leupold, the exit pupil of the Sightron will be 1.33 mm compared to the 1mm of the Leupold, which (if I calculated correctly) is about twice as big in area.

    So, in theory and at the same magnification, the Sightron will be easier and somewhat brighter to look through compared to the Leupold because it has a larger objective lens (60mm Vs 45mm) and it has nothing to do with the size of the main tube since the inner tube is probably about the same ID. Of course, the Sightron will have more lenses and if not properly coated that may reduce the amount of light transmission but that's probably nothing to worry about.

    Talk to your optometrist and tell him/her about using a riflescope. I have bifocals which means that the top half of my glasses are corrected for my distance vision. Looking through a scope, you are actually focusing on the near image transmitted by the ocular lens and of course, when you're on the ground, you're actually looking through the top of your lenses, which is not the best. My distance vision correction is minuscule, but thanks to age, my near vision has been deteriorating. So, you can adjust the diopter setting on the ocular of the riflescope to make sure you adjust the image of the reticle to be compatible with whatever vision correction you decide to use.
     
  3. mike06

    mike06 US ARMY 1970-1977 Silver $$ Contributor

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    Edward take a look at this site give the man a call he knows what he is doing and there to help you if possible not just take your money. https://www.bulzeyepro.com/
     
  4. Edward

    Edward

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    Thanks for the rapid and helpful responses. They give me hope and direction Ed
     
    mike06 likes this.
  5. 284winner

    284winner Gold $$ Contributor

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    My eyes have been deteriorating since I hit 50. I wear glasses most of the time but still in denial that my vision isn't really that bad. While shooting, I remove the glasses and use the scopes adjustment to see much better. This seems to get my vision back to 100%. Sounds like you have a clarity issue but a low light one. I personally think a 30mm tube and larger objective will cure those issues. If the issue lie's with an actual vision defect, your Dr will help with that issue. I don't believe that problem is fixable with any scope.
     
  6. Raythemanroe

    Raythemanroe Bullet Whisperer Silver $$ Contributor

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    The SIII 10-50 is going to be brighter than a good many non ED glass scopes. I know it's brighter than my GE 15-60ED but when it is super bright out I find the Sightron floods out when others see through conditions a bit better.. It's a trade off that needs to fit your eyes not mine.. That being said I have heard great things about the SV ED scopes Sightron has out..

    Ray
     
  7. Turbulent Turtle

    Turbulent Turtle F-TR competitor

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    If you find that your Sightron "floods out" when it's "super bright," you can correct that easily enough by reducing the aperture of the scope. Get a Butler Creek lens cap that fits your objective. I would guess something near 66mm for a 60mm objective; BC calls that a size 51 (65.4mm). Next, find the exactly middle of the cap and then cut out a hole that will reduce the front objective area in half. My calculations show that to be a hole with a diameter of 42.4mm or a radius of 21.1mm. This will reduce the aperture by 1 f-stop and it will increase the depth of field quite a bit so you will see the mirage better. The neat thing is, if you need to remove it during shooting, you can just flip it up.
     
  8. Raythemanroe

    Raythemanroe Bullet Whisperer Silver $$ Contributor

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    Camera lens filters fit at 62mm, you can use filters..

    Ray
     
  9. Turbulent Turtle

    Turbulent Turtle F-TR competitor

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    A camera filter does not do the same thing as the aperture reducer I just described earlier.

    I have experimented quite a bit with filters, mainly 3 different yellows and one light red. The filter only modifies the colors coming into the riflescope, and of course, it will reduce the brightness of the image and change the contrast and the color rendition. It will not affect the depth of field.

    If the brightness is too much, a neutral density filter can be used to reduce the overall brightness but it will not provide for the increased depth of field that may help in seeing the conditions better.
     
  10. Raythemanroe

    Raythemanroe Bullet Whisperer Silver $$ Contributor

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    Cameras have plenty of options at 62mm

    Ray
     

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