Author: DMcA

  • Cape Town – Telephoto Landscapes

    Regular viewers of this site will know I’ve become interested in using long focal lengths for landscape photography, initially in Moravian Tuscany in Czechia (here and here), and subsequently in the tea plantations of Sri Lanka.



    The technique involves using a telephoto lens, typically 100–400mm full-frame equivalent (FFE), to get an interesting perspective of the landscape from a distance. The attraction lies in both the perspective compression the lens provides and the interplay of light and shade across the folds in the landscape — quite a different approach from conventional wide-angle landscape photography, and one that produces markedly different results.



    Wherever I travel, I now look for landscape vistas that might lend themselves to this approach. A trip to Cape Town in December 2025 seemed a promising opportunity. The long vistas across the Table Mountain range felt like natural candidates, and this album shows the results.



    All but two of these photographs were taken with the OM-1 Mk II and the 50-200mm (100–400mm FFE) f/2.8 lens, with a mixture of tripod and handheld shots.



    Beyond the physical technique, the approach depends heavily on light and shade across the landscape, and I wasn’t particularly lucky in that respect. The best shots tend to come when shooting against the light, which wasn’t possible given my timing. I think there are better photographs to be had in Cape Town using this method, and I may well have another crack at it later this year.


    Touch or click any image to go to a lightbox view and then touch the full screen icon in the top right-hand corner to get the best viewing experience. For information on the shot and the location, be sure to click the little ‘i’ icon. And finally click the “heart” icon for photos you particularly like – this helps me understand which photos are more popular

  • EVF resolution – the missing metric

    Raw EVF megapixels, compared across cameras with different sensor sizes, tells you almost nothing useful about viewfinder quality. Linear resolution ratio is the correct metric: on that measure the OM-1’s 5.76MP EVF on its 20MP sensor achieves 54%, the second-highest in a comparison of eleven cameras, while the Sony A7CR’s 9.44MP EVF paired with its 61MP sensor achieves just 20%.

  • Giant OM1 I and II spreadsheets of my top photo settings

    The OM System settings backup file is unreadable and can only be restored to the same camera model — so when I moved from the OM-1 Mk I to the Mk II, transferring settings meant going through every menu item manually. These spreadsheets, built on BobCS’s 2022 framework and updated by reader MM with full User Guide page references, are the only structured templates on the internet that mirror the complete OM-1 menu system.

  • Sony Zooms vs the 600mm f4 Prime—comparative image quality

    Using standardised test data from The-Digital-Picture — the only widely available source with controlled lab comparisons of both the 600mm f4 GMaster and the wildlife zooms — the £12,000 prime shows minimal perceptible image quality advantage over the £1,600 200-600mm or the £2,400 400-800mm at 600mm. Independent numerical resolution data comparing exotic primes to wildlife zooms essentially does not exist, because manufacturers provide early samples to YouTube influencers rather than to test houses that might measure the difference.

  • OM and Sony wildlife zooms – lens handling

    The rotational inertia index for the Sony 400-800mm is 3.2 times higher than for the OM 50-200mm f2.8 without its tripod collar, which translates directly into how hard each lens is to swing when tracking a fast-moving bird. Neither Sony zoom has a focus preset function, and the Sony 400-800mm’s minimum focus distance of 350cm makes close subjects impractical; the OM 50-200mm with MC20 focuses to 78cm and delivers 2:1 FFE macro capability.

  • Dynamic Range and low-light noise – Sony vs OM zooms

    At true ISO 3200, DxO data shows the Sony full-frame sensor has approximately a 1-stop dynamic range advantage over the OM Micro Four Thirds sensor — but the OM pro zoom lenses are 1.3 to 1.7 stops faster than the Sony wildlife zooms at equivalent focal lengths, which cancels or exceeds that advantage. The Sony 200-600mm suffers a further penalty at 800mm: it must be cropped to reach that focal length, reducing the active sensor area to approximately APS-C size and eliminating both the resolution and full-frame dynamic range advantages simultaneously.

  • Resolution of OM vs Sony wildlife zooms

    Using Visual Extinction (MTF0) testing on a 4x ISO 12233 chart at 18 metres, the OM 50-200mm f2.8 with MC20 at 800mm FFE resolves 23 LPI — matching the OM 150-400mm and out-resolving the Sony 200-600mm at 21 LPI when that lens is cropped to reach 800mm. The OM 50-200mm with MC20 at 800mm loses only one LPI unit compared to the bare lens at 300mm, confirming that the 2x teleconverter is not meaningfully degrading resolution.

  • OM vs Sony zooms: focus accuracy shootout

    Across nearly 11,000 shots on Red Kites at Gigrin Farm, the OM 50-200mm f2.8 + MC20 achieved 93% focus accuracy and the OM 150-400mm achieved 92% — both ahead of the Sony 200-600mm at 90%. The Sony 400-800mm scored 98% but from only 808 shots, because at 2.5kg it was impossible to hand-hold for extended periods; the OM 50-200mm, weighing 1.2kg without its tripod collar, generated more than 2,700 analysable shots in the same session.

  • Using FastRawViewer to cull thousands of images

    FastRawViewer renders true RAW data rather than the embedded JPEG preview, pages through files at near-JPEG speed on a fast SSD, and has keyboard-driven colour labelling that makes it practical to work through tens of thousands of files without importing them into a DAM. At 50fps, one minute of shooting generates 3,000 images; the fine detail view via the Q key is the most reliable tool I have found for checking eye focus on birds during culling.

  • OM Pro Zooms – the effect of teleconverters, ISO and background on focus accuracy

    Testing the OM 50-200mm f2.8 (Little White) and 150-400mm f4.5 (Big White) across multiple sessions, the MC14 teleconverter imposes almost no focus accuracy penalty on the Little White — the combination remained above 90% in conditions where the bare lens achieved 93%. Background type turned out to matter more than ISO: birds against clear sky consistently outperformed the same lens against foliage by a wider margin than raising ISO by two stops.

  • Cape Town
    Kingfishers diving at Itaka

    One of my most recent discoveries for Cape Town bird photography (with thanks to M) has been Intaka island. This is a unique 16 hectare wetland and wildlife sanctuary located right at the centre of one of Cape Town’s most swish developments, Century City. For Brits, imagine London’s Barbican centre, at 5x the scale in a semi-tropical environment, with a 40 acre protected wildlife reserve at the centre of it. CC has fancy apartments, canals, neighbourhood shops, office blocks, and some great cafes and bars, plus a sizable conference centre, and magically also contains this peaceful oasis right at the centre.



    Intaka is home to 177 species of indigenous fynbos plants and 120 bird species, so is a very significant resource. There are two main ponds: the largest one has a huge Cormorant and Sacred Ibis population, which I have photographed in detail before. On previous visits I never saw much interest in the smaller one. However, the occupants of this pond, although less visible are no less interesting, because you can sometimes see beautiful Malachite Kingfishers there,



    Intaka normally opens at 7:00 am, but on a recent visit, I found you could buy a key to the gates and enter at any time. As a result, I came at 6:00 am on three successive days to try and catch the Kingfisher diving.



    Trying to photograph a Kingfisher is difficult. Trying to catch it in flight is extremely difficult. You can wait up to 2 hours for one to arrive, and it might only be there for 2-3 minutes. They are also lightning fast. I eventually got several sequences at 50 frames per second of the Malachite diving from its perch into the water. From perch to water took 14 frames, or 0.3 of a second for the full flight. It was back on the perch equally fast.



    I am a geyser of the older variety and my reaction time is around 0.3 to 0.5 seconds. So it’s physically impossible to capture this without some help. That help is the Olympus/OM system Pro Capture feature. This amazing capability (now copied badly, shamelessly and without any attribution by Sony and Canon), allows this kind of sequence to be frozen in time. The OM camera buffers up to 4 seconds of images (max of 99) without saving anything (the Sony is only 1 second). When you fully press the shutter button, the whole sequence is saved, so you can go back in time 4 seconds (actually up to 10 seconds at slower shutter speeds). I used 50 fps, and a buffer of around 35 images to capture the in-flight shots. BTW, 50fps is an impossible frame rate for Canon and Sony, which in practice manage only about 25fps for long bursts.



    This album starts with a fairly ruffled looking Malachite in the middle of his wash and brush-up. Then two full sequences of diving for a tasty freshwater prawn including the “money shots” of it entering the water. These are followed by a sequence of him getting breakfast prepared, which consists of repeatedly whacking the unfortunate prawn against the side of the perch. The last two shots are of the Pied Kingfisher, which is less frequently seen at the pond and which I have never seen fishing. Did get it in flight though.



    All of these shots were taken with the OM1 Mkii and the new 50-200 (100-400mm FFE) f2.8 lens – the “Little White”, with either the 1.4x or 22.0x teleconverters. I have never shot a Kingfisher in earnest before, and these are the best images I have ever got, so there are quite a few.





    Touch or click any image to go to a lightbox view and then touch the full screen icon in the top right-hand corner to get the best viewing experience. For information on the shot and the location, be sure to click the little ‘i’ icon. And finally click the “heart” icon for photos you particularly like – this helps me understand which photos are more popular