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Paul Kay

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Paul Kay last won the day on August 14

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About Paul Kay

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    Sperm Whale

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    Isle of Arran, Scotland

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    Seacam - UK & Ireland

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  1. No manufacturer could make and sell poor lenses these days. So virtually all are 'fit forpurpose'. FWIW I have some current Leica lenses which I use on old rangefinders, and some current Sony lenses for the A7 series. If I shot them side by side I would be hard pushed to say one was better than the other. There are differences but in the real world these aren't so much about 'sharpness' and all the aspects photographers discuss at length, but more are subtle; variations in flare patterning or starbursts created from the diaphragms. 'Pro' lenses may be built to stand more and heavy continuous use (perhaps/maybe, I'm not convinced) which has little relevance if they are in a housing anyway. So as the last poster suggested, if you are happy with what you use then its designation is irrelevant.
  2. Sony A7 series which replaced my Canon dSLRs. Love/hate relationship BUT my 'hit rate' has increased so on blance a good move. Biggest gripe is lack of really useful shorter focal length IF macro - the Canon 60EFS was brilliant even on FF with an extender. For wide work I find the system excellent though.
  3. Kevin at https://aquaphot.com He will work on all sorts of gear and I've used him for years and he's been excellent for everything I've thrown at him.
  4. One from yesterday in about 2m of water. Sony A7 series with 20/1.8 behind a 200mm dome.
  5. You can buy Indicator Silica Gel cheaply enough off eBay. It is orange and turns green when it has absobed water. To reuse it needs heating to a 80/90 degrees C (not boiling point) until it turns orange again. You can use a fine mesh (stocking or plankton net or similar) to make sachets. FWIW I keep my housings and cameras in Pelicases whn not in use and use Indicator Silica Gel in with them to ensure no trapped moisture causes problems - it is surprising how long water can take to dry out from the recesses of housing. You can do the same in a housing which may help ensure condensation is minimised.
  6. I use the Sony 20/1.8 with good enough results (corner acceptability will depend on your fastidiousness). Its a great all round lens. I use it with a 200mm dome and its fine.
  7. The lens I used has a thread which is quite close to Leica screw mount (as used in enlarging lenses). This allowed me to fit the lens which is not unlike an enlarging lens onto a Leitz (New York) focus helicoid bought from an auction at a reasonable price - they crop up from time to time. I used a couple of Leica screw mount extension tubes (readily available and cheap) to roughtly adjust focus, then the helicoid to adjst further and popped it all onto a Sony A7II using a Metabones adapter. Then it was just a matter of fitting it into a housing (Seacam) and adjuting the port with extenders as usual. I tried fixed focus but it wouldn't be difficult to fit a gear onto the helicoid and have adjustable manual focus. The camera was set to show red on in focus edges which worked pretty well. I'll take a photo of it and post idc.
  8. This photograph: may not be world beating, but read on. It was taken on a Seacam housed Sony A7II at 200ISO. The lens is a manual focus which because I could not fit a gear, was fixed at one focus setting. Its focal length is 3.75" (~95mmish) at infinity and it was originally designed for stereo photography and intended to cover 3" x 3" format (75mm square) although it is not a macro lens. But what is quite extraordinary is that the lens was made my Grubb of Dublin (world renowned telescope maker) in 1865, so it is an over 150 years old photographic lens. We have come a long way but not, perhaps, quite as far as we might think. It won't stand up to absolute comparison with any modern macro lens of course, but it is quite extraordinarily good considering its age (and condition!).
  9. No, I think that Adams was saying that technical perfection does not, in itself, make a 'good' image. This will apply just as well to a photograph shot wide open on a fast lens with lots of 'bokeh' as it will to an image taken stopped down and sharp throughout. If its not well thought out then no amount of technical precision can compensate for this. In my book there are three elements to a photograph. Primary is subject. Of equal standing are the next two: lighting and composition. The rest is technical and that is up to the photographer to deal with. Personally I am less worried about corner unsharpness than many see to be because, provided the three primary elements are strong enough, then minor 'flaws' will be overlooked, or at least they will be by all except the technically obsessed photographers who view the image. I say this from personal experience.
  10. If you are prepared to do so, you can delve back in time and into the photographic press of the mid-1850s. Here you will discover that photographers have been obsessing about technical quality from at theast the point when it started being recorded in publications such as these (aurally alomst certainly before). Old B&W images which were created back then are view for their content today and no doubt this is how our contemporary images will be viewed in the future. It was Ansel Adams who said that 'there is nothing worse than a sharp image of a fuzzy concept" and IMO this applies as much to underwater images as above. Personally I shoot for content and technical imperfections, provided they don't impinge on the fundamentals of the image, are of little consequence.
  11. FWIW. After 40+ years of professional photography, above and below water, I no longer own a dSLR. Virtually ALL current digital ('system') cameras are so good that the differences are nuances. Some do do certain things better than others but ALL are extraordinarily capable. Just to think, I spent 25 years shooting film .....
  12. Sad news from the Highlands. Underwater Photographer Dan Burton from Devon, whom I used to meet at underwater events, was killed in an air collision a few days ago: https://www.theguardian.com/environment/2021/sep/20/climate-activist-sacha-dench-injured-and-colleague-killed-in-paramotor-accident I'm sure many hear will know him or if not his name and work.
  13. If it was recovered from the sea then in theory it should be reported to the Receiver of Wreck and this involves a fair bit of paperwork and waiting to see if the owner can be found or claims it.
  14. Anyone still interested in the RS? I have one which I will never use and I've offered it for use in promoting conservation but no takers. So if anyone is interested its available and part of the proceeds will go to a marine conservation charity. pm me if interested. Thanks, Paul (it has procure/instructions and some spares and seems to work ok but I won't guarantee its waterproof - sold as seen.
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