© 2026 Robert Canis
Day free
Due to the unpredictability of the British weather, please leave the entire day free in case it is moved back or brought forward a few hours
Parking and transport
The exact meeting place will be given nearer the workshop date where there is plenty of on-street residential parking.
Need a lift?
Should you be travelling by public transport, do get in touch as I would be very happy to pick you up from Sittingbourne train station and back again.
In conjunction with the RSPB, I am excited to be offering this unique half-day photography workshop photographing the Denge Sound Mirrors.
Nestled on a private island, accessible, only, by a secure swing bridge, lie three relics of a pre-World War II aerial defence system. Also, known as Listening Ears, Concrete Dishes and Acoustic Mirrors, these huge concrete structures - ranging in size from 20 to 200 feet - were built between 1928 and 1935 as part of Britain's national defence strategy as a means of detecting enemy aircraft long before it was visible.
The Denge Sound Mirrors worked by using their curved surface to concentrate sound waves and focus them onto a microphone or a human listener equipped with then state-of-the-art stethoscopes. Once the receivers were adjusted for best reception, the results would be compared with those from one of the other ‘ears’ and used to calculate an aircraft’s height, speed, and flight path.
This is the only location where all three designs can be seen together
In order to secure this workshop, special permission has been granted from the RSPB. This area is particularly important for its breeding bird population so it can only take place during the winter. This is a very special opportunity to obtain some truly unique photographs of these incredible structures where, other than our workshop group, no other members of the public will be present.
RSPB contribution: A not insignificant percentage will go to the RSPB so not only will you have a great day out photographing but you will also be contributing to the conservation of our feathered friends!
Appreciating that, for some, such a location can be a little daunting, I thought it would be helpful if, prior to the day, everyone received a pre-recorded 'ideas' and editing tutorial where I give my thoughts and suggestions on photographing the Sound Mirrors and eventual post-processing. Such aspects will include long exposure, aspect ratios, filtration, B&W conversions, Masks and Graduated filters.

Upon reaching the mirrors, to refresh, I'll briefly reiterate what has been said on the recorded turoial such as compositional recommendations and advise on exposure and filtration. Given the relatively small area and in order to avoid being in each other's way, the group will be split in two between the mirrors and wall. After a while, you will be swapped around thereby giving everyone equal opportunity.

With their hard, gritty appearance, such imposing features make for wonderful brutalist-esque images. Wide-angle lenses work fantastically well in exaggerating their curved surfaces.


While ND filters, accentuate their bold outlines and 'stillness' within the landscape.

There are, as you can see, countless possibilities.

Thank you very much indeed for considering this workshop and should you have any questions - however small or insignificant you think they might be - then do drop me a line. I’m here to help and provide you with a wonderful fun day of inspirational photography in the company of like-minded enthusiasts.
While photographing the beauty of nature, be it a dew-covered dragonfly or a stunning sunrise, is probably towards the top of most photographers' wish lists, challenging oneself with something unusual should never be overlooked. The Denge Sound Mirror workshop run by Robert certainly falls into the unusual, but that does not detract in any way from the thoroughly worthwhile and challenging experience. As always Robert is on hand to assist and encourage you to “think outside the box”. The other aspect that makes this workshop special is that it is the only opportunity to photograph these structures as a small group without the general public. This is due to the site being on private RSPB land and only accessible privately through Robert’s connections.
Simon Crittenden
Thanks Rob & the RSPB for arranging the trip onto the reserve for an up-close photography session of the Dungeness Sound Mirrors. The mirrors offer a good selection of interesting angular structures in various degrees of decay all set against a backdrop of water, reed beds and wildlife. I could easily have spent another hour there trying different viewpoints and angles! Well worth the trip, and glad the weather held up!
Claire Peters
At a hidden location in rural Kent, the Sound Mirrors proved an unexpected delight on a bleak December morning. Rob’s planning and the small group, together with a pre-workshop video, ensured we all came prepared and were able to make good use of every minute. I recommend this outing to all landscape photographers. It will brighten the most dismal winter day!
Barbara Hedge
Great day out photographing the Denge Sound Mirrors. Brilliant opportunity, the place to ourselves, and Robert was, as always, helpful and constructive with suggestions and ideas. Would definitely recommend.
Lesley Burnand
Thank you for dropping by and considering attending a workshop. I love nothing more than to pass on to others the knowledge I have gained over the last 30 years as a professional photographer and 15 as a workshop and tour leader. My group sizes are always small ensuring a fun and friendly group dynamic, lots of 'personal space' in which to photograph without too much fear of others getting in your way and as much tuition as you would like or feel that you need. I hope you can join me!
Although under the 'umbrella' of Workshops, please note there is a difference between the three types that I offer. To avoid any confusion, please see below.
Those taking place in the UK are classed as Workshops where learning is the primary aim, and in the case of those which are multi-day residential, very often include image critique and post-processing sessions.
Overseas trips are classed as Tours where the logistics are all taken care of and where the emphasis is on getting you to great locations at the best time of the day. Since these may include hide photography and working in cold, windy conditions where one-on-one tuition isn't practical, these are less hands-on. However, prior to the hide session or upon arriving at a location, I will give advice and suggestions on composition, lens selection and exposure.
Creative Visions is a new concept that I have designed to specifically nurture your artistic growth. They can take place in either the UK or abroad combining both workshop and tour principles. There will be critique and post-processing tutorials and, most importantly, you will be encouraged to go beyond the record and representational and instead produce more intimate creative interpretations.