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Astronomy > Telescopes > TS Optics > CF-APO > TS Optics Apochromatic refractor AP 70/420 CF-APO 70 FPL55 Triplet OTA
Product no.: 70672

Apochromatic refractor AP 70/420 CF-APO 70 FPL55 Triplet OTA

$ 960.00 incl. VAT plus shipping costs
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Product description

The AP 70/420 optics: The triplet lens with a 70 mm aperture and 420 mm focal length meets the criteria of a fully apochromatic lens. Even at high magnifications, the image is free of annoying colour fringing. Even bright stars are rendered without annoying blue fringing in astrophotography.

The central element of the lens is made of FPL55 optical glass, which is comparable to the well-known FPL53. Another special glass supports colour correction. The triplet lens with air gap is fully adjustable. Each optical glass-air surface is multi-coated. The lens is in a temperature-compensated mount.

The smallest apo in this series impresses with features that are usually only found in larger apochromats. The objective is colour-pure and, with the appropriate correctors, even outshines expensive telephoto lenses. The mechanics and focuser also meet the highest standards. The compact apo is suitable for small camera mounts such as the SkyGuider from iOptron, the EQ3 or even for good photo tripods.

2.0" rack & pinion focuser: The large focuser is optimised for photography and can carry a load of up to 6 kg – more than enough for heavy cameras with accessories! An M54x0.75 internal thread is available for screw-in adapters. The focuser also offers 360° rotation for selecting the right image section.

For astrophotography, we recommend the 0.8x flattener/reducer from the recommended accessories. It increases the aperture ratio to f/4.8 and is designed for full-frame cameras. The flattener can be screwed directly into the thread of the focuser and has an M48x0.75 thread on the camera side. The back focus is 55 millimetres. This is ideal for DSLR cameras with the appropriate bayonet adaptor. You will also find these in the accessories section.

TS Optics is a brand of Teleskop-Service.

It not only matters which telescope you buy but also where you buy it. Our additional services:

  • We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
  • We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.

Specifications

Optics


Type
Refractor
Type of build
Apochromat
lens design
Triplet
Aperture (mm)
70
Focal length (mm)
420
Aperture ratio (f/)
6
Resolving capacity
1,97
Limit value (mag)
11
Light gathering capacity
100
Max. useful magnification
140
Tube weight (kg)
2,6
tube diameter (mm)
76
Tube length (mm)
300
Coating
FMC
Stray light baffles in the OTA
yes
dew cap diameter (mm)
88,5

Focuser


Type of build
rack and pinion
Connection ( to eyepiece)
2
Connecting threaded socket (camera-side)
M54
Free aperture (mm)
51
Motorized
no
Ring clamp
yes
Load capacity (kg)
6
Gear reduction
yes
Rotating
yes

Mount


Type of build
OTA
Mounting type
no mount

Included accessories


Dew Shield
yes
Deviating optics
no
Corrector
without
Prism rail
Vixen-Style
Carrying handle
yes
Transport cases
yes
finder base
Vixen/Skywatcher Level
Eyepiece adaptor
2" / 1.25"
Tube clamps
yes
Test protocol
yes

General


Series
CF-APO

Area of application


Astrophotography
yes (very good)
Moon & Planets
yes
Nature Observation
no
Nebulae & galaxies
yes
Sun
no (Only with appropriate Sun filter)

Recommended for


Beginners
no
Advanced
yes
Observatories
no

Product safety

Manufacturer: Teleskop-Service Ransburg GmbH, Von-Myra-Straße 8, 85599 Parsdorf, DE, www.teleskop-express.de

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*All prices include VAT plus shipping costs.

TS Optics Apochromatic refractor AP 70/420 CF-APO 70 FPL55 Triplet OTA
Optional flattener
TS Optics Apochromatic refractor AP 70/420 CF-APO 70 FPL55 Triplet OTA

Transport cases

TS Optics Apochromatic refractor AP 70/420 CF-APO 70 FPL55 Triplet OTA
Test protocol

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