Classic Ortho 10mm, 1¼" Eyepiece (HT-MC)

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Classic Ortho 10mm, 1¼" Eyepiece (HT-MC)

# 2954110

€ 73.00 Price excl. German VAT tax (19%): € 61.34

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  • Baader Classic Ortho 10mm 1¼" Eyepiece , apparent field of view 52°, incl. winged rubber eyecup
  • Parfocal Eyepiece series with very high transmission
  • This eyepiece delivers a pure-white image with outstanding sharpness and contrast
  • True High-Transmission- (HT) and Multi-Coating (MC) on all glass-air-surfaces offer a brilliant image while showing almost no internal reflections
  • Suitable as projection eyepiece for OPFA (Eyepiece Projection adapter)

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Q-Turret Eyepiece Series with Revolver
Baader Classic Ortho/Plössl eyepieces

Baader Classic Ortho/Plössl (Q-Turret) 1¼" Eyepieces


Parfocal eyepieces with a very high transmission, very good contrast and thus a very clear field of view, free of distortions. The multi-coating eliminates almost all internal reflections. The eyepieces provide 50° apparent field (6/10/18mm Ortho), sharp field stops and excellent ergonomics for comfortable observing.

Classic optical design of orthoscopic eyepieces

The lens assembly consists of a triplet-element and one plano-convex eye lens, so there are only four glass-air-surfaces. The interior has been blackened for a very good suppression of stray light. Of course, the hard anodised barrel has got a filter thread.

Looking into the eyepieces, you'll see the effect of the anti-relex-coating and the blackened lens edges. The coating is so good that it seems like there are no lenses at all! On our optical bench, we couldn't find any disadvantages compared to so-called "planetary eyepieces" which cost five times more.

The eyepieces use the same glasses and the same optical design as the old orthoscopic Zeiss Jena eyepieces.

The 32mm-Plössl-eyepiece is the perfect eyepiece for a large field of view at telescopes with 1,25"-focuser; eyepieces with longer focal lengths don't provide a larger field of view (but a smaller apparent field).

Technical data of the Baader Classic (Q-Turret) eyepieces

Focal length (mm)Optical designBarrelLens elements / groupsApparent field of viewParfocalEyeRelief
Field stop (mm)Height (mm)DiameterWeight
6 Classic Ortho 1¼" 4 / 2 52° yes 5 5 34,2 34,8 37g
10 Classic Ortho 1¼" 4 / 2 52° yes 8 8,7 41,12 34,8 48g
18 Classic Ortho 1¼" 4 / 2 52° yes 14,67 16,8 54,46 34,8 81g
32 Classic Plössl 1¼" 4 / 2 50° yes 21 26 78,8 34,8 94g

Baader Classic Ortho/Plössl-eyepieces for projection photography

Standard Barlow elements often can not provide enough magnification for taking images of the planets. Classical eyepiece projection is the solution if you want to increase the focal length by 4x or more. The Classic Orthos provide the necessary high magnifications in combination with an OPFA (Eyepiece Projection adapter). Orthoscopic eyepieces are well-known for high sharpness on the axis and very good transmission – perfect for planetary observations. So, it is possible to get sharp views of the planets even at very high magnifications.

Using an OPFA, you can set the magnification almost without limits by changing the distance between eyepiece and camera sensor. You can find information on calculating the resulting focal length in the description of the OPFA-system. For best results and highest resolution, you should use the Fluorit Flatfield Converter (FFC / 3x-8x) instead, which was designed especially for projection photography.

The Classic Plössl is perfectly suited for afocal projection with the ADPS (Afocal Digital Projection System) and a compact camera with fixed lens – the eyepiece's large lens on the camera side reduces vignetting, so that you can use a larger part of the camera sensor. The lower magnification and the resulting larger field of view make this combination very interesting for images of the surface of moon or sun (the latter only with a suitable solar filter).

The lean housings of the Classic-eyepieces with diameters of less than 35mm fit without any problems into all common projection adapters and can also be used without problems for visual use at any binoviewer.


Furhter information, image results...

Baader Blogpost:
The eyepiece series from Baader Planetarium

Baader Blogpost:
The camera at the eyepiece

Baader Blogpost:
Barlow lenses, their magnification factors and working distances

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Additional Information

Manufacturer Baader Planetarium
SKU (#) 2954110
EAN Code 4047825027788
Net weight (kg) 0.05
Eyepiece Series Classic (Q-Turret)
Focal Length 10 mm
Apparent Field of View 52°
Eye Relief (mm) 8 mm
AR-Coating High transmission multi-coated (HT-MC)
Parfocal Eyepieces Yes
Barrel Size (in) 1¼"
Optical Design Orthoscopic
Speciality No Speciality (standard eyepiece)
Eyepiece Design
Field Stop Diameter 8,7 mm
Field Stop Displacement to reference plane -2 mm
Number of Lens Elements 4
Number of Groups 2
Slip Protect Safety Classic Undercut
Eyepiece Body above Reference Plane (mm) 17,12 mm
Length of 1¼" barrel (mm) 24 mm
Outer Diameter 34,8 mm
Included Items
Dustcaps 1¼" dustcap (31,8mm)
Eyecups winged eyecup (1¼")
Optional Accessories Q-Turret Eyepiece Revolver
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2 Item(s)

AKJ 239/08/2020 27/08/202010:52
  • more than 4 year(s)
  • Rating:
Classic Ortho 10mm eyepiece
I bought this item to my 15cm achromatic refractor. I have opportunity to compare this eyepiece to my friend lot of expensive orthoscopic 9mm eyepiece. I must to say that this Baader ortho eyepiece gave much brighter and, above all, a sharper image over the wide area than the one owned by my friend. I am very satisfied. Really a product worth the money.
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Robert 146/05/2020 26/05/202012:03
  • Rating:
GRF am Jupiter mit Classic Ortho Okularen
Nach Wochen mit ungünstigen Bedingungen -Wolken, seeing...- konnte ich heute in der Frühe recht ordentlich beobachten. Bei ruhiger Luft und etwas milchiger Transparenz. Und dabei zum ersten Mal die neu dazugekauften 10mm Orthos vom Baader am C8 Binokular probieren. Der Kauf hat sich gelohnt! Die Okulare überzeugen durch gute Verarbeitung, angenehmes Einblickverhalten und kontrastreiche und randscharfe Abbildung zu einem erschwinglichen Preis. Das Gesichtsfeld habe ich mit 25´ausgemessen, dem Planetenbeobachter reicht das völlig.
Vorgestern hatte ich sie zum ersten Mal angesetzt, da war das seeing allerdings so mäßig, daß ich auf eine Zeichnung verzichtet habe, nix zu erkennen an Detail. Aber ich konnte eine weitere GRF-Passage nehmen, diesmal zu 330° in SysII. Und: Ich bin an sich ein schwacher Farbenseher, aber der GRF kam deutlich rötlich bei mir an... Ich halte das den Orthos zugute :) .
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