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Manufacturer: APM
Product number: APMB2,7x
EUR149.90new
EUR 149,90
incl. 19 % VAT (DE)
The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.
excl. 6.95 € shipping costs (DE)
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Product expected to be available from 30.05.2025
rating: 5.0 of 5APM Coma Correcting 1.25" ED Barlow Element 2.7x1
- Details..
- Technical data..
- In the box..
- Manufacturer infos..
- Safety informations..
APM Coma Correcting 2.7x Barlow Lens
1.25" Filter ThreadBarlow lens with real ED glass, calculated to correct coma in Newtonian telescopes. This Barlow lens allows you to observe planets as well as deep sky objects at the edge of the 1.25" eyepiece field with similar quality as on-axis.
The photographically comacorrected field is designed for the APS-C format. However, due to its unique quality, this APO Barlow lens also provides very good imaging quality on refractors, SCs, etc. The ED element is made of ED glass FK61 (comparable to Ohara FPL51), it is cemented and provided with a broadband multicoating on both sides, which has a transmission of more than 99% in the spectral range from 400 nm to 700 nm.
The optimum working distance is 105 mm from the center of the last lens. The focal length is - 62.9 mm. The free aperture is 22 mm.
Despite its "only" 22 mm free aperture in the secondary focus, this Barlow lens offers a 100% illuminated field up to APS-C format when operated with 105 mm working distance.
| Mechanical length: | 18.5 mm |
| Coating: | broadband multicoating |
| Body material: | aluminum |
| Free aperture: | 22 mm |
| Magnification factor: | 2.7x |
| Number of lenses: | 2 |
| Lens design: | Cemented doublet |
| Connection thread: | M 28.4 mm filter thread on both sides |
| Backfocus: | 105 mm from center of last lens |
| Suitable for: | Newtonian telescopes (optimal f/4) |
| Fully illuminated field: | at least 30 mm |
| Effective focal length: | - 62.9 mm |
| Weight: | approx. 50 g |
| Manufacturer / Importeur: | APM Telescopes |
| Street: | Quierschieder Weg 38 |
| ZIP / City: | 66280 Sulzbach |
| Country: | Germany |
| Telefon number: | +49 6897 9249290 |
| Email: | anfrage@apm-telescopes.de |
| Website: | www.apm-telescopes.de |
Safety informations: PDF Download
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Reviews
Written by Georg Nyman
on 2023-05-31
"Passt perfekt zu meinem Newton und gibt mir die notwendige Vergrößerung. Optisch auch sehr gut"
Written by Frank Köhler
on 2021-12-17
"Bisher auf Grund des Wetters keine optische Prüfung am Stern möglich. Mechanisch und von der Verarbeitung Topp. "
Written by Klaus Bernhardt
on 2016-06-16
"Verwende die Barlow als GWK im Maxbright Bino. Funktioniert sehr gut, keine Farbfehler und vollständige Kompensation der Koma."
Written by Michael Dickson
on 2015-12-03
"I bought this item as I had damaged my previous barlow element. As only the element was damaged I saved on having to buy the whole barrel assembly for the barlow to fit into...great!"
