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3 - Delta 78, By 3m Precision Optics

I been reading many postings on this site. Many people have been looking for the "Delta 78" Lens, By 3m Precision Optics. I came across 3 of them... Brand NEW. If anyone needs them, e-mail me at

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2 Answers

How about Fuzhou Antyco Optics CO., Ltd?

Fuzhou Antyco Optics Co., Ltd. is a professional manufacturer of crystal and optical components in the photonics industry. Antyco owns standard factory, advanced fabricating machine including Spherical Milling Machines, CNC Plano Milling, High speed Polishing, Precision Polishing, CNC Grinding and Polishing, Coating Machine, Ultrasonic Cleaner, etc.. The strong and steady growth have lead us to a very skilled team of fabricators, mechanical engineers, process engineers, optical engineers and coating designers, which successfully provided the advanced technical solutions and satisfactory products for different areas of the numerous customers.
Our manufacturing capabilities consist of all types of customized lens, Beam Splitters, Polarizing Optics, Prisms, Filters, Coatings, Optical Systems, Optical Assemblies and Optical Systems Solutions, Laser Crystals, NLO Crystals. The products are widely used in laser industry, optical communication, laser display, medical equipment, survey equipment, precision Instrument and semiconductor. Optical elements of various materials can be processed in Antyco: zinc selenide(ZnSe), zinc sulfide(ZnS), calcium fluoride(CaF2), barium fluoride(BaF2), silicon(Si), germanium(Ge), YAG crystals, YVO4, sapphire, quartz glass, optical glass, ceramics, cooper, aluminum, etc.
with the strict quality management system, Antyco got the ISO 9001:2000 Certificate. Today, over 60% of Antyco products are exported to USA, Japan, Germany and other European, Asian Market. Looking ahead, Antyco will continue to deliver customers with reliable quality, competitive price and on-time delivery products.

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Sep 26, 2016 | 2007 Toyota Camry

1 Answer

Images has a lot of haze

Haze can be from the lens or the camera sensor in some extreme conditions.

You didn't say the camera model - but I'll assume a modern, DSLR type with removable lenses. First, try a different lens. If the resulting picture is clear, the problem is with the lens. If the problem still exists, then the problem is with the camera. You may have some luck cleaning the sensor of the camera. This is a *very* delicate procedure and is done with some very specific tools and supplies for the job. The wrong procedure or use of improper cleaning supplies can render your camera useless.

The same holds true for the lens. These are delicate, precision optics and should not be serviced by end users. You should inspect the lens by holding the aperture fully open and look through it front to back and back to front. Gently clean the front and rear glass with lens cleaner and leans cleaning tissues. Do not rub hard. The coating on "Single Coated" and "Multi-Coated" optics can be damaged if rubbing too hard.

If the source of the haze is still present (either in pictures or with the ***** eye looking through the lens, it should be returned to the factory or authorized repairer for a repair estimate.

i hope this helps & good luck!

Sep 22, 2011 | Sigma Cameras

1 Answer

My Sony DSC-F717 has mold inside of the lens. How may I disassemble the lens to clean the optics inside?

This is a relatively common job for cameras with removable lenses, but even then, best left to those with expert experience because of the precision required for reassembly. It is considerably more complicated for cameras that do not have removable lenses.
You might try camera stores in your area, but you best bet would be Sony service:

Feb 28, 2011 | Sony Cyber-Shot DSC-F717 Digital Camera

1 Answer

My lens will not zoom when the zoom ring is turned. What can I do?

I'd contact Tamron Tech Support. These are not cheap optics and they are assembled with precision. Opening the lens could cause contamination or further damage resulting in an even costlier repair, if out of warranty. Most Tamron lenses are covered by up to 5 years of warranty - provided you haven't opened it up - or abused it.

I hope this helped - good luck!

Nov 10, 2010 | Tamron 18-200mm f/3.5-6.3 for Nikon

4 Answers

When disc is inserted it says 'unknown disc'

one particular disc? or all discs?
Unplug for 5 minutes and re-try.


Jan 03, 2010 | Alba DVD55 DVD Player

2 Answers

My ps3 will not read disc,s so i cant play any games when u put them in ,is this basic manufacterur default so can get it fixed for free or if not wat is cheapest way to fix it

looks like your lens has taken a beating.
call up sony center and explain them the problem. You would have to ship the ps3 to them.
Remember to make a back up of all your game saves and downloaded content if possible.

If you are still under warranty, Sony should replace the lens for you for free.
I would suggest replacing it with Sony, even if you have to pay for it, rather than doing it yourself or by an unauthorized person.
Ask for a warranty on the lens if you get it fixed via Sony.

Changing Lens needs a lot of precision work.

Sep 05, 2009 | Sony Playstation 3 (PS3) Console

1 Answer

Lg dr275 does not recagnize any disk

This can be as simple as a dirty lens or more drastic like defecitve optics. If you can access the lens, try cleaning it using a cotton swab and alcohol. Next try playing a music CD. If the CD willplay OK, but hte DVD will not, then the optics are failing and will need to be replaced.

Keep us posted.


Feb 18, 2009 | LG DR275 Recorder

1 Answer

DVD will not play,message reads incorrect disc format we were watching DVD when it froze and will not permit any DVD to play now

Try cleaning the optics lens using a cotton swab and alcohol. If that does not resolve the problem, than one of the following has occurred:

1) The optics assembly is not able to read the disc anymore (replace the optics).

2) The logic board has failed in some way and the information obtained from the disc is being marked as invalid. This option will take more diagnosis to completely resolve.

If option 1 appears to be the case, the unit should stillbe able to read a music CD. CDs require a lower level of laser than DVD.

Keep us posted.

Jul 18, 2008 | Televison & Video

3 Answers

I have a old 61 inch tv the lens are out. Are these lens still available numbers on them are 646376-1 delta 24 passed 08121490 by U S Precision Lens inc Cinn. Oh.

The lens isnt the problem the tubes(CRTs) are what go bad. Whats your model number I may be able to help you out. The other site I work at has a huge inventory of used picture tubes that are all in good working order. Finding new tubes for anything older than 97 models is almost impossible. But post your model number and I should be able to help you out.

Apr 14, 2008 | Sony KP-51HW40 51" Rear Projection...

1 Answer


it's worth about as much as you paid for it.

Mar 06, 2008 | JVC AV-48WP74 48" Rear Projection...

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