Telescope-Service - Your Expert for Telescopes, Mounts, Binoculars, Spotting Scopes and Accessories. We offer a broad selection of eyepieces, filters, accessories for astro-imaging and many more interesting items.


Telescope Optics
Parabolical Primary Mirrors and Elliptical Secondary Mirrors

primary and secondary mirrors for telescopes

Optical Quality If you put much effort into building your own telescope nothing is as important as the certainty that the optics of your telescope are very good. Only then will you have a satisfying overall result.

All of our mirrors have a very high optical standard. The most important factor in choosing the mirrors was that their quality is very constant, you do not need to fear to get a "lemon". All mirrors are at least diffraction limited, typically much better than that.

Easy Payment: We offer our customers several easy and fast payment methods. You will receive exact payment details when ordering or on request!

TS Primary Mirrors
Very good mirrors with an excellent value for money. Available from 150mm to 300mm mirror diameter.		 Orion UK Primary Mirrors
High-quality primary mirrors made of Suprax. HILUX 96 per cent reflective coating.

Available from 150mm to 350mm mirror diameter.
TS Secondary Mirrors
Very good mirrors with an excellent value for money. Available from 21mm to 102mm mirror diameter.		 Orion UK Secondary Mirrors
High-quality primary mirrors made of Suprax. HILUX 96 per cent reflective coating.

Available from 34mm to 81mm mirror diameter.


Telescope-Service (TS) Primary and Secondary Mirrors

GSO primary mirror 150mm

Our TS primary mirrors offer an excellent value for money.

 TS Parabolical Primary Mirrors

Our TS primary mirrors were chosen because of their excellent value for money. The optical quality is constantly at a very high level. You need not fear to get a "lemon"!

We offer the same optical quality in mirrors using four different mirror substrates: Float, BK-7, Suprax (similar to Pyrex) and Low Expansion (similar to Zerodur).

All mirrors have an aluminium reflective coating, reflectivity is approximately 90 per cent. The aluminium coating is protected by a properly applied protective coating.

Delivery Time: we usually have all mirrors in stock. Please request the actual delivery time to be sure.

Our TS mirrors have a surface quality of 1/16 wave RMS at the least, typically better.

Article. No. Aperture / Focal length / f-ratio Thickness / Weight Mirror Substrate Price - Euro incl. VAT
HS 150/750 G 150mm / 750mm / f : 5 18.5 mm Float 140.-
HS 150/1200 G 150mm / 1200mm / f : 8 18.5 mm Float 140.-
HS 200/800 G 200mm / 800mm / f : 4 30 mm / 1.4kg BK-7 196.-
HS 200/1000 G 200mm / 1000mm / f : 5 30 mm / 1.4kg BK-7 188.-
HS 200/1200 G 200mm / 1200mm / f : 6 30 mm / 1.4kg BK-7 177.-
HS 200/1200 LX 200mm / 1200mm / f : 6 30 mm / 1.4kg Low Expansion 420.-
HS 250/1250 G 250mm / 1250mm / f : 5 36.8 mm BK-7 279.-
HS 300/1500 BK7 300mm / 1500mm /  f : 5   BK-7 597.-

GSO Secondary Mirror

 TS Elliptical Secondary Mirrors

Our elliptical flats have the same high optical quality of our primary mirrors. Consequently they are a good choice for anyone who wants an excellent value for money in addition to a good quality.

There are two different variants with 90 per cent reflective coating. The mirror substrate itself shouldn't be the sole argument to choose a more expensive mirror, the influence of the substrate on the optical quality is practically zero in small secondary mirrors.

Article No. Diameter (mm / inch) Reflectivity Mirror Substrate Price - Euro incl. VAT
FS 21 21mm / 0.8" ca. 90% Float Glas 22.-
FS 28 28mm / 1.1" ca. 90% Float Glas 33.-
FS 31 31mm / 1.22" ca. 90% Float Glas 36.-
FS 40 40mm / 1.6" ca. 90% Float Glas 42.-
FS 50 50mm / 2" ca. 90% Float Glas 45.-
FS 63 63mm / 2.5" ca. 90% Float Glas 78.-
FS 70 70mm / 2.7" ca. 90% Float Glas 115.-
FS 88 88mm / 3.6" ca. 90% Float Glas 198.-

Please send requests or online orders to: sales@telescope-service.com


Set for Amateur Telescope Makers
16" Primary Mirror With 2" Crayford Focuser and Primary Mirror

Parabolic Primary mirror We have made an irresistable offer for amateur telescope makers who plan to build their own Newtonian telescope. All parts are of course new.

The set consists of:

Primary Mirror 16" f/4.5

-- image quality: Diffraction limited or better
-- Diameter / Aperture 406mm
-- Edge Thickness 42mm
-- Mirror Substrate B 270
-- Focal Ratio f/4.5

Secondary Mirror

-- Diameter 88mm

Focuser

-- 2" Crayford focuser with 2" brass compression ring. Including 1.25" adaptor with compression ring.

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Absolute Top Price for the Set ........................................................................................ 1098.- Euros

-----------------------------------------

Of course we also offer primary and secondary mirror cells. Please check our German website or request details!

Please send requests or online orders to: sales@telescope-service.com



Orion (UK) Primary Mirrors

Orion 350mm parabolic mirror for telescopes

The optical quality of the Orion (UK) mirrors - Made in Europe - is extremely good.

These are the same mirrors that we offer in our TS-Lightweight Newtonians.		 Orion (UK) Parabolical Primary Mirror for Newtonian Telescopes

These mirrors are made by Orion Optics in England. They are truly Made in Europe.

The mirror substrate is Schott Suprax. With their HILUX 96 per cent reflective coating there will be more light entering your eyes, giving overall brighter images.

Suprax is very similar to Pyrex in thermic properties. The cool-down time is only marginally longer than that of Pyrex.

At the same time Suprax is a much longer material. As a consequence mirrors can be made thinner than regular mirrors, drastically reducing cool-down time in the process. Obviously, these mirrors also weigh less than thicker Pyrex mirrors.

You will not need a complicated mirror cell - the mirrors are ideally suited if you want to build a lightweight Newtonian telescope.

Delivery Time: we have most mirrors in stock. Please request the delivery time to be sure.

The optical quality of all our Orion UK mirrors is 1/16 wave RMS or better.

Article No. Aperture / Focal Length / f-ratio Weight / Thickness Price - Euro incl. VAT
HS 6" f/5 O 153mm / 750mm / f-5 - 388.-
HS 6" f/8 O 153mm / 1200mm / f-8 - 388.-
HS 6" f/11 O 153mm / 1600mm / f-11 - 418.-
HS 8" f/4.4 O 203mm / 880mm / f-4.4 1.5kgs 615.-
HS 8" f/6 O 203mm / 1200mm / f-6 1.5kgs 585.-
HS 8" f/8 O 203mm / 1600mm / f-8 1.5kgs 645.-
HS 10" f/4.8 O 254mm / 1200mm / f-4.8 3kgs 810.-
HS 10" f/5.0 O 250mm / 1250mm / f-5.0 3kgs 810.-
HS 10" f/6.3 O 254mm / 1600mm / f-6.3 3kgs 810.-
HS 12" f/4 O 300mm / 1200mm / f-4 4.4 kgs  /  29mm 1080.-
HS 12" f/5.3 O 300mm / 1600m / f-5.3 4.4 kgs  /  29mm 1035.-
HS 13,8" f/4.6 O 350mm / 1600mm / f-4.6 6.7kgs / 35mm 1882.-
Orion secondary mirrors Orion Elliptical Secondary Mirrors

The secondary mirrors have the same high-grade surface quality of the parabolical primaries. Their reflectivity is also 96 per cent (HILUX)

The mirror substrate is plate glass - in such small mirrors the mirror substrate has practically no influence on the performance of the mirror.
Article No. Diameter Price - Euro incl. VAT
FS 35 O 36 mm 51.-
FS 44 O 43 mm 61.-
FS 50 O 50 mm 79.-
FS 63 O 62mm 120.-
FS 75 O 74mm 155.-
FS 82 O 81mm 217.-
FS 90 O 90mm 224.-
FS 100 O 100mm 268.-
FS 110 O 110mm 311.-
FS 120 O 120mm 348.-
FS 130 O 130mm 435.-
FS 140 O 140mm 609.-
FS 150 O 150mm 638.-
FS 160 O 160mm 812.-

Please send requests or online orders to: sales@telescope-service.com



Primary Mirror Stock List
Last Update: 18 Aug 2008

When ordering please ALWAYS state the Serial Number (in the second last column) if a serial number exists for the mirror!

Notes on the Mirror Substrates:
Float: a simple but homogenous mirror substrate. Works well in particular with small mirrors.
BK7: a good homogenous and strain-free mirror substrate used by GSO. BK7 is an optical glass with better thermic properties compared with Float.
Suprax: A low expansion mirror substrate with improved thermic properties compared with BK7, but with better mechanical properties.
LX (Low Expansion): An excellent mirror substrate with nearly zero thermic expansion. Comparable with Zerodur.
BVC: A relatively rare mirror substrate with nearly zero thermic expansion, but requires a very elaborate mirror cell.
Brand
D / f
Mirror Substrate
Thick-
ness
Interferometric Test
test result is listed here if a test report exists
Hilux
Coat.
Ser.
No.
Price - Euros incl. VAT
GSO
150/750
Float
19
 
 
 
140.-
GSO
200/800
BK7
25
 
 
 
177.-
GSO
200/1000
BK7
25
no protocol / cosmetical stains stemming from the three brackets of a mirror cell
 
338
177.-
GSO
200/1000
BK7
25
 
 
 
188.-
GSO
200/1200
LX
22
 
 
 
198.-
GSO
200/1200
LX
22
Rohr Test 20.03.03 #11, Protocol is missing
 
301
198.-
GSO
200/1200
LX
22
Rohr Strehl 91 / PV 0.21 wave
 
302
235.-
GSO
200/1200
LX
22
Rohr Strehl 93 / PV 0.23 wave
 
303
235.-
GSO
200/1200
LX
22
Rohr Strehl 92 / PV 0.25 wave
 
305
235.-
GSO
200/1200
BK7
25
 
 
 
177.-
GSO
250/1250
BK7
36
 
Yes
 
498.-
GSO
250/1250
BK7
36
 
Yes
341
498.-
GSO
300/1500
BK7
38
 
Yes
 
849.-
GSO
300/1500
BK7
38
 
 
 
591.-
Orion
150/750
Suprax
20
Strehl 97,2 / PV 0,166 wave
Yes
335
418.-
Orion
150/750
Suprax
20
Strehl 98,0 / PV 0,135 wave
Yes
336
418.-
Orion
150/1200
Suprax
23
Strehl 97,8 / PV 0,142 wave
Yes
312
418.-
Orion
200/900
Suprax
22
PV 1/5 wave (without certificate)
Yes
352
385.-
Orion
200/1200
Suprax
22
Strehl 98,2 / PV 0,151 wave
Yes
342
585.-
Orion
200/1200
Suprax
22
Strehl 98.3 / PV 0,154 wave
Yes
343
585.-
Orion
200/1600
Suprax
22
Strehl 98,6 / PV 0,116 (1/8) wave
Yes
308
745.-
Orion
200/1600
Suprax
22
Strehl 97,9 / PV 0,155 wave
Yes
329
645.-
Orion
200/1600
Suprax
23
 
?
340
545.-
Orion
200/1600
Suprax
23
Strehl 99,1 / PV 0,100 (1/10) wave 
Yes
353
845.-
Orion
250/1000
Suprax
25
Strehl 98,3 / PV 0,154 wave
Yes
349
729.-
Orion
250/1250
Suprax
29
Strehl 98,1 / PV 0,163 wave
Yes
313
729.-
Orion
250/1250
Suprax
29
Strehl 98,1 / PV 0,113 (1/8) wave
Yes
314
729.-
Orion
250/1250
Suprax
29
Strehl 98,5 / PV 0,144 wave
Yes
316
729.-
Orion
250/1250
Suprax
29
Strehl 97,8 / PV 0,145 wave
Yes
317
729.-
Orion
250/1250
Suprax
29
Strehl 99,0 / PV 0,122 (1/8) wave
Yes
318
729.-
Orion
250/1250
Suprax
29
Strehl 97,7 / PV 0,131 wave
Yes
319
729.-
Orion
250/1250
Suprax
29
Strehl 98,2 / PV 0,149 wave
Yes
320
729.-
Orion
250/1250
Suprax
29
Strehl 98,4 / PV 0,145 wave
Yes
321
729.-
Orion
250/1250
Suprax
29
Strehl 97,2 / PV 0,147 wave
Yes
351
729.-
Orion
250/1600
Suprax
29
Strehl 98,3 / PV 0,148 wave
Yes
350
729.-
Orion
300/1200
Suprax
37
Strehl 98,4 / PV 0,153 wave
Yes
326
998.-
Orion
300/1200
Suprax
38
Strehl 97,9 / PV 0,154 wave
Yes
332
998.-
Orion
300/1200
Suprax
38
Strehl 98,4 / PV 0,141 wave
Yes
354
998.-
Orion
300/1500
Suprax
32
Strehl 98,5 / PV 0,119 (1/8) wave
Yes
330
1180.-
Orion
300/1500
Suprax
38
Strehl 97,4 / PV 0,171 (almost 1/6) wave
Yes
333
998.-
Oldham
200/800
Borofloat
27
 
 
339
285.-
Oldham
457/2030
BVC
36
 
 
347
2335.-


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