Question about ATN Aries MK258

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Accessing the Battery Terminal


I have just brought a Tasco NVS460 (ATN Aries mk258) at an auction. The battery terminal is corroded and I need to remove the backplate that the eye piece attaches to in order to access it. There are 3 screws to remove but are there any other gotchas that I should be aware of?

Thanks in advance,


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Image tube is glass and fragile but this unit comes apart easy lots of poorly soldered wires can easily break if you are not careful

Posted on May 31, 2008

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Posted on Jan 02, 2017

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Your ground (-) wire from the battery could have a bad connection. Follow it down to where it ends and check connection. If not it, check all positive connections. If corroded, try pouring cola-cola or OJ terminal if you can't replace. If still not working, check inline fuses coming from positive (+) terminal. Hope this helps.

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Hello, is the IR illuninator tube seperate from the ATN Aries rifle scope? If it is, then check the battery, ok. If the battery is ok, then check the polarity of the IR lumin. Make sure the battery is installed properly.

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1 Answer

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Sorry, You probly disloged the micro plate in the image intensifier tube or brok it. Very thing in scope MK258 is manufactured in Russia. I have two or three of these Russian image tube, they are all generation 1 and cheap. About the only thing they use of scope shock is a thin rubber colar around the image tube. There is a good possibly it destroyed the image tube, sorry. stewbison

I am on face book Richard with a picture of one ugly dude.

Feb 06, 2011 | ATN Aries MK-258 Weapon Sight

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I purchased a mk258 direct from atn, as live in the uk i hope it would be ok and with international company and warranty. after 2nd use the intensifier tube packed up, on advice from sales dpt i returned...

dear fixya team , thankyou for your mail, as this is a one off problem and will not purchase any other products from the usa, i see no point in joining here but just thought you might be able to help. as yet there is still no reply from atn sales dpt with reference to a refund or even to confirm they recieved unit in post. you would have thought a big usa company like atn would have better customer service. i took time to view many night rifle scopes and chose a mk258 looking at reviews and the company warranty. i think now was a bad mistake and will send all details to a uk air gun magazine to warn other uk airgunners about buying direct from this company and buy in uk. regards gordon harman

Dec 29, 2009 | ATN Aries MK258

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A seized focus control should be able to be repaired by most optics repairers. It is a simple job and doesn't require the removal of the image intensifier. They should be made aware though that the image intensifer needs to be opened in a "cleanroom" envrionment and should be purged with nitrogen once repair is completed

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