Jump to content

Interceptor121

Member
  • Content Count

    2655
  • Joined

  • Last visited

  • Days Won

    92

Interceptor121 last won the day on November 20

Interceptor121 had the most liked content!

Community Reputation

336 Excellent

About Interceptor121

  • Rank
    Humpback Whale

Contact Methods

  • Website URL
    http://interceptor121.com

Profile Information

  • Gender
    Male
  • Location
    Woburn Sands, UK

Additional Info

  • Show Country Flag:
    United Kingdom
  • Camera Model & Brand
    Panasonic GH5
  • Camera Housing
    Nauticam NA-GH5
  • Strobe/Lighting Model & Brand
    2x Sea and Sea YS-D2, 2x Inon Z240
  • Accessories
    Too many

Recent Profile Visitors

59733 profile views
  1. Subscribe to my blog John there is plenty more stuff http://interceptor121.com
  2. No that is correct on the diagonal but I do not shoot diagonals I shoot horizontal subject so the WACP and WWL-1 on that axis are 0.5x and this new lens 0.58x Check the table here https://interceptor121.com/2019/05/12/nauticam-wwl-1the-best-wide-angle-lens-for-underwater-video-on-the-gh5-and-other-micro-four-thirds/
  3. The zoom range depends on the port system. The models that have a fixed port perform over the full zoom range I would expect the Panasonic LX10 to work well as the RX100 The 0.42x means nothing like 0.36x Sent from my iPhone using Tapatalk
  4. I am interested in the 18809 and have sent you a PM requesting pictures
  5. IATA regulations apply to all carriers except some exotic ones I think this new version of the regulations is actually very easy to check and implement as it is based on physical count of the devices that anybody can do. NiMh batteries are not a problem and go in check in no point taking them in hand luggage really
  6. it is interesting that the LX10 is not mentioned in the compatibility list? Sony confirms best compatibility for the range together with the TG-5 series however those cameras work fine with older design like UWL-04 already
  7. DxOMark Review for the A7RIV is out the camera scores 99 one point less than the A7R III and the Nikon D850 While dynamic range has a miniscule improvement and color depth stay the same the MK IV drops in high iso performance 3523 down to 3344 This is obviously marginal looking more closely the performance in print is similar when looking at on screen as it goes to 1:1 pixel level the mark IV gap from the III is more significant To me this means clearly too many pixels are not helping...
  8. I found this review pretty comprehensive https://wolfcrow.com/blackmagic-pocket-camera-4k-real-world-review/ The conclusion from wolfcrow Those who want to shoot documentaries, weddings, events, music videos, etc., should stick to the Panasonic GH5 (B&H, Amazon) instead. For extreme low light work, nothing beats the Sony a7S II (B&H, Amazon). On the whole though, the Blackmagic Pocket Cinema Camera 4K (Amazon, B&H) is a great camera as far as image quality is concerned, and is a perfect fit for low budget short or feature films, web series, corporate videos, etc Any more real life examples out there?
  9. @JohnDoe who said I do not like RAW? Unlike most people here in the video section I shoot stills maybe I am even a better photographer than I am a video guy listening to the feedback. I use RAW all the times with still images however my workflow for still images is not focused on white balance. In fact as a photographer you know that if you don't the colour right in the shot at least on a good part of your subject using a strobe or ambient light when you white balance it looks weird. In fact in most cases the reason why I white balance ambient light shots is because I did not white balance at time of shooting, then the white balance is right later corrections are minimal. What RAW gives you is the ability to exploit the dynamic range of the camera much more, underwater you tend to shoot underexposed according to the camera to avoid clipping highlights as camera metering fails in many situation due to blue water scattering light. So then you push up you darks and stretch the image to bring it back to the detail that seemed to be missing in the first place. After you get this right the next steps are local adjustments like graduated filters, brushes etc etc. Usually you spend much more time on local adjustments than you do on exposure. For video is a bit different as you are moving around in most cases and video tools do not offer the same ability to perform local adjustments. What you are left is exposure and white balance. For white balance what I said before holds if you use lights the adjustments are minor if you don't you need to adjust in camera. The other items is the ability to bring the dynamic range back into the picture that is probably the most important part however if you lock exposure this will only work well on a static scene. It is crucial for video to get the exposure right in camera and actually I am not a believer of fixed exposures. If you set a fixed exposure and you move around you have a risk of clipping the highlights or crushing the blacks here with a RAW editor you can recover to an extent. Otherwise you set a variable exposure for example set aperture and shutter and leave ISO float this will make sure you don't have huge variations reducing the need for the raw adjustment later. It goes by itself that unless you have backlit scenes you can nail exposure and white balance in camera and in fact many of my still images have only local adjustments for things I could not fix in camera. Regarding your question on the WACP it vignettes until 20mm so out of 18-55 you get 20-55 x 1.4 crop x 0.36 = 10-27 mm fisheye am not sure how useful is the range between 17-27 mm for you but the alternative is to forget the WACP entirely and go on Canon EF mount for APS-C So instead of your WACP you could get 1. Sigma 17-70 mm (as this is cropped sensor I would not get the 8.5 acrylic dome and settle for the 180mm glass dome need to work out the extensions) this gives you 24-98 mm rectilinear which for most cases this is all you need 2. Tokina zoom fisheye 10-17 mm this gives you the same of WACP if you need more zoom you put a kenko teleconverter With the WACP you still have to cover normal angles and macro so the cost of the set up above will be significantly less as the Tokina takes a compact acrylic port I do not own this camera nor I plan to buy it however as I said before I would not be looking at the WACP personally if I had to
  10. To add on Andrei point for splits it is true glass sheds water better but acrylic can be made work and actually you want your system to float as much as possible and a heavy dome is bad I would also recommend 140+acrylic dome for splits the acrylic also gives you the rectilinear lens option with 16-35 mm Sent from my iPhone using Tapatalk
  11. John most of the ‘evolutions’ are dictated by what else is available. Until a few years ago lights were limited to 60 degrees so working with narrow lenses was the norm for close shots Then 90 degrees lights came around and now you have 120 or even 150 degrees lights. Video has traditionally been rectilinear with no distortion so when cameras like the GH5 have cone around the first choice has been 7-14 mm lenses to match the new lights except 7-14 performs really badly in the edges when you go finning. So now the solution to that is fisheye like lenses that are distorted but dont pull corners in the shape of wacp wwl-1 etc. Optical performance remains largely unaffected by evolution in sensors generally a rectilinear lens too wide will have perspective distortion on any camera body. I wrote this post to explain it https://interceptor121.com/2019/10/13/using-rectilinear-wide-lenses-underwater/ So 18mm equivalent once in 16:9 has no corners issue for most if you wanted to use a rectilinear lens in water and still be wide this is as far it goes offering 90 degrees horizontally If that is not enough (and for most cases it is enough) you can go WWL-1 way the field of view increase is not 30 degrees as diagonals dont matter but 14 degrees on the horizontal compared to a rectilinear 100 degrees diagonal lens so the effective field of view increase is 28% not 80% if you look at diagonal If you think about it this means a frame 2.57 meters wide instead of 2 meters In any case in my opinion a removable optic with zoom like the WWL-1 remains preferable when you have larger subjects because the range of focal length you cover is huge but am not that sold on WACP fixed ports for video So when I need to shoot rectilinear because I don’t have large subjects and mostly have people in the shots I like to have a lens like the leica 12-60 that gives me plenty of flexibility otherwise wwl-1 is my choice. I tend not to use the 8-18mm in video as 18mm is too wide for close ups for my taste Sent from my iPhone using Tapatalk
  12. 16-35 full frame or 8-18 is the limit for still images when it comes to distortion at least for me but is a tad narrower than the wwl-1 (94 vs 102) the frame however is taller and not distorted The old school consensus when you shot a gates or similar was that 18 mm equivalent is the best because horizontally this is exactly 90 degrees and you never have corner distortion If you have the 9-18mm olympus and the 180 mm dome try a shorter 50mm extension instead of the suggested 65 to avoid pull in corners Sent from my iPhone using Tapatalk
  13. IBIS is useful underwater for video not so much for still images. When you shoot with strobes most of the times you use fast shutter speeds, even if you don't the strobe freezes the motion. In some cases shooting at very slow shutter speed I have had instances where the part of the frame hit by the flash was crips and the rest was blurred ... and my camera does have IBIS however I was shooting at 0.5 s shutter to get the water the colour I wanted at 22 meters see edges of the motorbikes in the distance here. I am not sure the close shots that are referenced on UWPhotoguide needed any IBIS but there are some situation where it would be useful. Think also that in my case there are four stops between the shutter speed that guarantees no shake 1/30 and 0.5 and clearly the camera is not capable of that amount of stabilisation Exhaust Bike by Interceptor121, on Flickr From what I understand Canon is lagging behind on in body IBIS because they historically relied on lens IS Olympus and Panasonic are way ahead and seems Sony is making progress
  14. For the canon 8-15mm you really want a circular dome. The zen 170 is a cut kf a 11 cm radius sphere and to avoid vignetting you will need to push the lens right in and you are back at more distortion and loss of field of view The nauticam 230 glass dome would be a larger option however it is also a cut of a 12 cm radius and the 1 cm missing means you need to push the lens in a little but nowhere near the zen I have the 140mm dome and is a complete sphere clearly on MFT the smaller radius is enough but on full frame may be not Either way there are no other complete domes on the nauticam chart than the 140mm Sent from my iPhone using Tapatalk
  15. Out of interest which videos on your channel are shot with the BMPCC4K? I have checked several and are all GH5 or Z-Cam
×
×
  • Create New...