Zeiss SFL and Zeiss DTI for 24 Hour Birding

Following on from last year when we tested the Zeiss SFL 10x40 and 8x40 binoculars, Toby Carter from Zeiss joins Martin back on the Somerset Levels, this time testing not only the Zeiss SFL 10x30 and 8x30's but also the Zeiss DTI 3s.

What does SFL stand for? SmartFocus and Lightweight.

What does DTI stand for? Digital Thermal Imaging.

Top Quality Optics

The Zeiss SFL range is a stand-out collection of lightweight binoculars that make the perfect accompaniment to any walk.

But what makes them so good? Watch the video below to find out.

Video made by Joe Cullis.

What is the difference between the 8x30 and 10x30 Zeiss SFL Binoculars?







Exit pupil diameter



Twilight factor






Close Focusing Distance



Busting the myth – Can you only use thermal imaging cameras at night? 

No! Thermal imaging cameras, like the Zeiss DTI 3/35 can be used at any time of day. Their heat-sensor technology reveals creatures in dense undergrowth, through woodland and in bushes.

Having one with you whenever you're out and about is a fantastic way of seeing something you would have otherwise walked right by. 

Skip to 5:31 in the video to learn more about the DTI's.

I’m convinced! Where can I buy?

The Zeiss SFL Binoculars are available in four magnifications:

You can find the Zeiss DTI Thermal Imaging Camera here:

Read next:

Thank you!

Thanks for taking the time to read our blog, we really do hope they help you out and answer some of your questions. If you still have some unanswered, then please feel free to get in touch with our team of experts.

We have a LiveChat option on our website and we can, of course, be contacted via our email, we're also on the end of the phone too! Read more on how to contact us here >

Want to write for us?

If you've got experience with producing content on photo, video and/or optics products or techniques then we would love to hear from you. Contact our blog editor, Bea, with a sample of your work at bea@cliftoncameras.co.uk.

  • By Martin Drew
  • 15 Mar 2023

Category Menu