Red dot angled lens

[0xDEADBEEF]

I am a new owner of M&P 15-22 Performance Center. I have considered starting a hello thread but you guys are probably tired of those.

So as they say, pics or GTFO so here is my rifle:

The sight is EOTech XPS2-0. It is awesome! I ordered Bushnell TRS-25 red dot before it and sent it back right away because the dot was a red blob and the front lens was mounted crooked.

I'd like to keep it clear of any attachements but will probably get something for the fore grip, probably Magpul AFG2. The rifle was no bargain the range ordered it for me at MSRP.

Today was my first day with it at the range. I zeroed the sight and went through 100 rounds of CCI Mini-Mags and 120 rounds of Federal bulk 525 Champion. All worked flawlessly. My aim, not so much I have much to learn but it is fun!

Edit: this was a post in picture thread but devolved into a discussion about construction of tube red dot sights, so moderator moved it to a separate thread.

So,
Hello everyone! Thanks for nice comments about my new rifle and discussion about red dots ;-)

 

[Gopher Slayer]

I ordered Bushnell TRS-25 red dot before it and sent it back right away because the dot was a red blob and the front lens was mounted crooked.

I'm sorry to be the one to tell you...

The front lens is suppose to be crooked to reduce glare.

99.9% of the time (with decent optics) it's the shooters eye making the dot a blur. My shooting buddy found out about his astigmatism when he got a Primary Arms micro dot and saw a semicolon instead of a crisp dot. He tried a Vortex Sparc and had the same problem. He now wears glasses to read and shoot and all his dots are perfect.

 

[w0ady]

^interesting, thanks.

 

[IceAuger]

I'm sorry to be the one to tell you...

The front lens is suppose to be crooked to reduce glare.

99.9% of the time (with decent optics) it's the shooters eye making the dot a blur. My shooting buddy found out about his astigmatism when he got a Primary Arms micro dot and saw a semicolon instead of a crisp dot. He tried a Vortex Sparc and had the same problem. He now wears glasses to read and shoot and all his dots are perfect.

I believe that is my issue as well. Sometimes I look through the sight and it's a perfect little dot, and another time it is a weird shape comprised of a bunch of individual dots. Take my eye away for a second or two and then it's back to the single dot again.

Oh, and the front lens on my TRS-25 is angled too.

 

[Kayback]

I believe that is my issue as well. Sometimes I look through the sight and it's a perfect little dot, and another time it is a weird shape comprised of a bunch of individual dots. Take my eye away for a second or two and then it's back to the single dot again.

Oh, and the front lens on my TRS-25 is angled too.

All my front lenses are vertical, IIRC. Aimpoints Comp, Aimpoint H-1 and a Chinese knockoff.

From what I can recall, if you rotate the sight and the dot blur rotates with the sight, it is the sight. If the dot stays blurred in the original position it is your eyes.

I haven't tested that, and I probably shoould because I also have Astigmatism, but I always have my glasses on and I've never seen a dot that is disfigured.

 

[0xDEADBEEF]

The front lens is suppose to be crooked to reduce glare.

Glare? From what? It doesn't matter what the angle of the lens is there will be always reflection depending on the position of the light, flat surface and the observer. Now, in this case the observer is me, on the other side of this and I don't care about the glare on the other side of the sight. If you want to reduce glare (so your prey don't notice you) there are special filters (kind of a mesh) for that.
This crooked lens is just plain shoddy workmanship and it does introduce slight offsetting of the image (because of double refraction).

99.9% of the time (with decent optics) it's the shooters eye making the dot a blur. My shooting buddy found out about his astigmatism when he got a Primary Arms micro dot and saw a semicolon instead of a crisp dot. He tried a Vortex Sparc and had the same problem. He now wears glasses to read and shoot and all his dots are perfect.

Yes, I can believe that. I thought so too for a moment. And I will also agree that my sight is not perfect and I probably have little astigmatism. The thing is, I can see the image in my EOTech very clearly. Even when I am tired and can't focus for a longer time it may get a little blurry but it is never a huge streaky star/blob I saw in this sight.

Maybe I am crazy, but I like my optics - camera lenses, binoculars and now sights to be perfect.

 

[ChattanoogaPhil]

Page 7
Section 2 Fudamentals
Paragraph 1


http://www.bsaoptics.com/docs/RED_DOTS_Manual.pdf

 

[BillyJack2012]

Congrats on the rifle! Enjoy it and the EOTech. Looks like no expense spared. As for the AFG, I went that route too. I found that it just didn't feel right and went with a VFG. I liked the looks of the AFG better but the VFG felt really good. Completely opposite of what I thought I would do.

 

[0xDEADBEEF]

Page 7
Section 2 Fudamentals
Paragraph 1
http://www.bsaoptics.com/docs/RED_DOTS_Manual.pdf

I see you made it a separate thread.

Thanks for the link. I understand that if the design bounces the light off the front lens, the front lens has to be at slight degree, like in reflex sights that have only one lens. But in my case the lens was tilted a little to the side. Unless maybe the led illuminator is down on the side as well. In that case it may be just me being stupid and I stand corrected.

 

[ChattanoogaPhil]

All my front lenses are vertical, IIRC. Aimpoints Comp, Aimpoint H-1 and a Chinese knockoff.

From what I can recall, if you rotate the sight and the dot blur rotates with the sight, it is the sight. If the dot stays blurred in the original position it is your eyes.

I haven't tested that, and I probably shoould because I also have Astigmatism, but I always have my glasses on and I've never seen a dot that is disfigured.

That's a good way to test.

Your Aimpoint is angled too. If it isn't then it's defective . Click on FAQ in the below linked page. There is also an explanation about the dot looking irregular.

From dime store optics to the best of the best, folks have the same questions.

Aimpoint Micro H-1 4MOA/M4 Mount Combo | LaRue Tactical

I see you made it a separate thread.

Thanks for the link. I understand that if the design bounces the light off the front lens, the front lens has to be at slight degree, like in reflex sights that have only one lens. But in my case the lens was tilted a little to the side. Unless maybe the led illuminator is down on the side as well.

Yes, for more lengthy discussion we move it out of the pic threads.

I have two Primary Arms Micro dot. One has the emitter at 6'oclock, the other is at about 4'oclock. Folks were griping about the the emitter being at 6'oclock because it was obstructing a portion of the front sight post co-witness. The front lens on both appear angled back (top of lens pushed further back into the sight housing) and the lens with the 4'oclock emitter appears to be slightly pushed to one side, I think-- kinda hard to tell. In any event, they both work great as long as I have my long distance glasses on. Without my glasses the dot looks like a cluster of grapes.

 

[Kayback]

Your Aimpoint is angled too. If it isn't then it's defective .

Lol even after checking the first link I didn't believe you and just unearthed all my sights. My wife wanted to know why I was grabbing rifles out of safes and old Aimpoint Comp's out of boxes "BECAUSE SOMEONE ON THE INTERNET IS WRONG!!!!!!"

Darn me. It's me. All of the lenses are canted backwards. I honestly did not notice and I've been using the Aimpoint Comp since 1999. Go figure.

The Aimpoints have a very minor cant, especially the H-1 but the Chinese copy leans back pretty far. I stand corrected, thanks.

KBK

 

[Gopher Slayer]

Read the description.
http://www.primaryarms.com/Primary_Arms_Micro_Dot_With_Removable_Base_p/md-06.htm

 

[IceAuger]

Without my glasses the dot looks like a cluster of grapes.

That's what I see as well on occasion, but I wear contacts. It seems to come and go depending on how long I'm looking through the sight.