Discovery Telescopes
Telescopes Spotting Scopes Accessories Binoculars Optics
Order By Phone 1-877-523-4400
 
       
   
Browse By Category

 

Major Announcement

Recent Customer Comments!!!

Computer-aided Interferometry is here!!

–Interferometery test of a Chinese made optic
Before and After

GOT SCRATCHES?

 

Primary Optics

There certainly is a lot of "hoopla" in the optics marketplace these days about wave-front accuracy. Who do you believe?. If the company you are buying your optics or telescope from do not employ the use of an interferometer in their shop, how can they possibly make claims on something they can't see?

The Knife-edge or Foucault test is a good test and in the hands of an expert optician, outstanding results can be achieved. These types of test are very good at seeing zones on the surface of optics, but they really do not measure the converging wave front well without the human error aspect entering the equation. It becomes subjective, the interferometer takes the subjectivity out of the test, ensuring a high quality optical surface. One CANNOT guarantee or fully certifiy high quality wave front claims using knife edge/Foucault tests as their sole means of testing. You owe it to yourself to remember this as you look at our "competitors" websites and literature. Again, how can they possibly make claims on something they can't see?

For primary mirror testing, our optical shop incorporates the use of two interferometers, an equal-path and a scatter-plate. The use of these sensitive tools require isolation-flotations tables and high quality optical supports to eliminate vibrations. This is very expensive equipment.

We guarantee our primary mirrors to be 1/15-1/20 wave RMS or better.

Our honest approach to optics claims

We will utilize our experience and in-house technology to produce a high quality optical surface, free of zones, astigmatism and spherical aberration. All of our mirror and diagonal blanks are made from Precision annealed PYREX glass with the exception of our standard mirrors which are soda-lime glass. Our blanks are machined flat on the back and are expertly beveled, no chips.

Good optics are the result of hard work, dedication and having the right equipment. Trust your next purchase with us, you'll be glad you did.

CUSTOMER QUOTES

"My Discovery mirror ...beat the pants off my 4" APO"

"You guys always deliver for me"

"I attend a lot of star partys and I have never looked through another
telescope that can match the views my 17.5" TD delivers"

 


PLEASE CONTACT US BY PHONE TO ORDER OPTICS

PRIMARY MIRRORS
Made from precision annealed PYREX glass.
Upgraded enhanced aluminum coatings
(1/20 wave front RMS or better-up to 10")
(1/15 wave front RMS or better-12.5" and larger)

6"f/8
48" fl.
$189
8"f/6
48" fl.
$299
8"f/7
56" fl.
$299
8"f/8
64" fl.
$299
10"f/4.5
45" fl.
$659
10"f/6
60" fl.
$599
12.5"f/5
62.5" fl.
$849
12.5"f/6
75" fl.
$829
15"f/4.2
63" fl.
$1699
15"f/5
75" fl.
$1499
16"f/4.5
72" fl.
$1699
17.5"f/4.1
72" fl.
$2099
17.5"f/5
87.5" fl.
$1899
20"f/5
100" fl.
$2700
22"f/5
110" fl.
$3600
24"f/5
120" fl.
$4900
All primary mirrors have diamond generated (flat) backs with precision bevel front and back.

PRIMARY MIRRORS
Made from soda-lime glass (plate)

Standard ALsiO coatings
(1/13 wave front RMS or better)

6"f/8
48" fl.
$169
8"f/6
48" fl.
$249
8"f/7
56" fl.
$249
10"f/5.6
56" fl.
$499
13.1"f/4.5
60" fl.
$749

DIAGONAL MIRRORS
Listed by minor axis
Made from precision annealed PYREX glass
1.30"
$49
1.50"
$69
1.83"
$89
2.14"
$119
2.60"
$149
3.10"
$175
3.50"
$279
4.00"
$329
4.50"
$409
5.00"
$509
5.50"
$625
6.00"
$775
Upgraded enhance aluminum coatings.

Diagonal mirrors

Our diagonal mirrors are manufactured in our own optical shop utilizing proprietary methods we have developed over the last 20 years. What does this mean to the end user, you, our customer?. You are assured of receiving the highest quality optical work available anywhere in the world and at any price.

EVERY diagonal mirror is tested in our own Fizuea interferometer to ensure the highest quality surface accuracy possible. We guarantee 1/8 wave or better and yes we can provide photographic evidence when requested (at additional cost).

Our diagonal mirrors are tested using a non-contacting method, interferometry, throughout production. This method of testing yields a much higher surface quality.

OEM customers:

We can manufacturer any size and shape flat - diagonal up to 8.5 " minor and flat mirrors up to 20" in diameter. Over the years we have made our high quality diagonal mirrors for many reputable companies, many you would instantly recognize.

Keep America working, buy American made products

 

 

Telescopes

Discovery
Meade
Celestron
Televue

Spotting Scopes

Discovery
Meade

Accessories

Discovery
Meade
Celestron
Televue

Binoculars

Discovery
Meade
Celestron

Optics

 
 


Home | Contact Discovery| Events | Discovery Store

Copyright 2006, Discovery Telescopes
All trademarks are the property of their exclusive owners.