Celestron 93640 Universal Barlow And T-Adapter, 1.25-Inch Barrel Size, Black

Good one

Ok for the price but I think the quality of the product should be looked into.

Perfect Dual-Purpose Accessory! The Celestron 93640 exceeded my expectations. As both a 2x Barlow and a T-adaptor for astrophotography, it’s incredibly versatile. The build quality feels solid and durable with a sleek silver/black finish, and it connects seamlessly to my telescope. Using it as a Barlow gives me sharp, detailed views of the moon and planets, and when paired with my DSLR it easily transforms into a reliable T-adaptor for capturing images. I love that I don’t need two separate accessories—this does both jobs perfectly. An excellent value and a must-have for anyone looking to expand their viewing and imaging capabilities!

I am very new to astronomy and hadn't heard of a Barlow Lens before but as a complete beginner, I think this is a must have. It's very cheap to buy and doubles the magnification of each eye piece which has so far provided some fantastic views of the moon and a couple of other bits. Prior to buying this, I spent a lot of time on the various forums doing research but the impression I get is that astronomy is one of those areas where everybody has an opinion on the various bits available and the people with more expertise can be quite critical to certain products that are in practice, absolutely fine for the beginner/novice. I think this product is a great price point, very good quality and unless you are significantly more experienced, is likely to do the job perfectly for you.

Works great fit is perfect

Perfect for the amateur astronomer. Good quality.

Nice quality Barlow, not too expensive, easy to use. Definitely recommend.