---
product_id: 144342680
title: "Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera"
brand: "lightdow"
price: "€ 329.05"
currency: EUR
in_stock: true
reviews_count: 9
url: https://www.desertcart.sk/products/144342680-lightdow-900mm-f8-0-telephoto-mirror-lens-t2-mount-adapter
store_origin: SK
region: Slovakia
---

# Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera

**Brand:** lightdow
**Price:** € 329.05
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera by lightdow
- **How much does it cost?** € 329.05 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/144342680-lightdow-900mm-f8-0-telephoto-mirror-lens-t2-mount-adapter)

## Best For

- lightdow enthusiasts

## Why This Product

- Trusted lightdow brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

Description: This 900mm Manual ultra-telephoto, multi-coated mirror lens is a brand new lens. Incredibly compact and lightweight, this lens is ideally suited for sports and wildlife photography. This lens attaches to your camera with the included T-Mount adapter and works with auto focus cameras in manual mode. This lens is designed and constructed with ED Glass for enhanced dispersion. This combination provides the user with an extremely sharp picture with minimum color aberration. With its tremendous power, this lens is ideally suited for wildlife and sports photography. Multi-coated high definition optics and an integrated lens hood combine to maintain maximum contrast withreduced glare and reflections. It produces sharper, more intense pictures. Take incredibly close shots from long range distances. While this lens is designed for high definition telephoto photography, it is also one of the most affordable precision optics available, which allows anyone on any budget to enjoy shooting crisp, clear pictures.  Specification: Elements/Groups: 8 Elements/8 Groups Focal Length: 900mm Fixed Aperture: f/8.0 View: 5 degree Coating: Multi Coated Focus Type: Manual Filter Size Rear: 30.5mm Filter Size Front: 105mm Length: 140mm Diameter: 108mm Colour:Black Lens Weight: 645g  Compatible with: Canon, Nikon, Pentax, Sony, Olympus, Panasonic Dslr Cameras  If you are not sure if the lens is suitable for your camera,please contact us for confirm!  Package contents: 1x 900mm Mirror Lens 1x Front Lens Cap 1x Rear Lens Cap 1x Leather Carry Bag 1x T2 Adapter Ring

## Features

- Elements/Groups: 8 Elements/8 Groups ; Focal Length: 900mm ; Fixed Aperture: f/8.0
- Multi-coated high definition optics and an integrated lens hood combine to maintain maximum contrast withreduced glare and reflections.
- Take incredibly close shots from long range distances.
- NOTE: This is a manual lens, NO Electronic Contacts, your camera will not detect the lens when mounted, that's why it shows not connecting properly, please switch to MF MODE in order to use this lens correctly. Tips to use our Manual Lens: 1) Set the mode dial to Manual (M). 2) Set the Release w/o Lens option in the camera menu to Enable. 3) Set the Shutter lock option in the camera menu to Off: no lens.

## Images

![Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera - Image 1](https://m.media-amazon.com/images/I/51BuzDUD+DL.jpg)
![Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera - Image 2](https://m.media-amazon.com/images/I/518SisrUxvL.jpg)
![Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera - Image 3](https://m.media-amazon.com/images/I/51HmVUqOoQL.jpg)
![Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera - Image 4](https://m.media-amazon.com/images/I/51Q8lUN+FVL.jpg)
![Lightdow 900mm F8.0 Telephoto Mirror Lens + T2 Mount Adapter Ring for Sony Alpha A9 A7 A7R A7RII A7S A7SII A6000 A6300 A6500 A5100 A5000 Mirrorless Digitial SLR Camera - Image 5](https://m.media-amazon.com/images/I/51cNV9PgxZL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐ 







  
  
    This Lens is not bad but for my needs it did not work as I need very high resolution.
  

*by I***. on Reviewed in the United States on July 20, 2020*

This Lens is not bad but for my needs it did not work as I need very high resolution. I spoke to the seller and they agreed to refund me. The lens is light and easy to use. For good lighting/day time photography its great but for my night photography it did not work out.

### ⭐ 







  
  
    Unable to focus due to astigmatism.
  

*by D***P on Reviewed in the United States on July 28, 2020*

I would be better off using my 90 mm sony lens and digitally scaling it than to use this lens.I had high hopes for this lens. One should be able to make a mirror lens much more cheaply than a refractor, since one would only need the main mirror polished and aluminized on one face, and a secondary flat mirror also polished and aluminized on one face. At worst one would use an optical flat for the secondary mirror aluminized only in the center. This would require no corrections for chromatic aberrations since mirrors have none.Unfortunately the lens I got has serious astigmatism problems. I have attached a test photo that shows this problem. I have reduced the resolution by half, and I'm sure that Amazon will compress it even more, but the astigmatism is so bad, it should still be clear in my attached photo.The adapter this camera came with  was missing a set screw, and the other two were loose. I was able to replace the set screws, but unfortunately the E-mount side was loose on my camera. I ordered a replacement that fits snugly to give this lens its best chance, but this did not help.I tried contacting the manufacturer to see if there was any adjustment for the astigmatism, but they never replied.I will not be sending this back as I want to dissect the lens and see if I can see an assembly error, or if they just did a really bad job grinding the mirror. This lens is cheap enough to be considered disposable which is why I ordered it in the first place.I was using a Sony ARII camera, and I turned off the image stabilization because they had settings for 800mm, and 1000mm, but not 900mm. The photo was taken on a tripod with a 10 second delay on the trigger to allow the vibrations to die away.I am very disappointed.

### ⭐⭐⭐⭐ 







  
  
    Ok
  

*by J***N on Reviewed in the United States on January 16, 2020*

Not sharp, otherwise ok. Sue has reach!

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**Shop now:** [https://www.desertcart.sk/products/144342680-lightdow-900mm-f8-0-telephoto-mirror-lens-t2-mount-adapter](https://www.desertcart.sk/products/144342680-lightdow-900mm-f8-0-telephoto-mirror-lens-t2-mount-adapter)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-27*