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Tom_Kline

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Everything posted by Tom_Kline

  1. My experience which was shooting the 10.5mm on the D2X so is a bit dated is that I could and did use dome ports from a 100mm diameter macro dome port to a superdome. That is a strength of using a fisheye lens. I used them according to shooting circumstances. The superdome produced the best results that were noticeable even with 12 megapxels.The tiny dome worked better in water too shallow for the larger domes - but note that the camera was very close to the subject.
  2. I use focusing lights while scuba diving and doing photography mainly for night photography and have not noticed an adverse effect from the light in my pix. I do tend to keep the brightness level of the light down but that is to get at least an hour of lighting. I also use focusing lights for my salmon photography when it is dusk. This does help with focusing with DSLRs as they reach a point where focusing is not possible due to low light. As well focusing becomes slower when they become light-challenged. This point can be detected if I forgot to turn off focus assist in the camera menu (done this a couple of times!) as the "pilot" light will come on (Seacam strobes).
  3. Thanks for the mention Chris. I have been shooting salmon UW for several decades and with digital for about 1.5 decades. I have posted some of my technique shots here on WP. Basically I am using a DSLR for digital. I started with APSC (Nikon DX) then added Canon full frame as it came out first. My most used lens for salmon with the Nikon was the 10.5mm fisheye and with the Canon the 8-15mm fisheye zoom (I got one within a week of it being available!). I have only a few salmon shots done without remote control, which is of the simple 3-wire release type. I use flash for a good portion of my shots. It is very dark here (sun less than 10 degrees above horizon at true noon and it is behind a mountain) when the Coho spawn. On the plus side water gets very clear once the air is at sub-freezing temperatures! Lots of examples on my website. The few vids I have done show shots being taken: https://www.salmonography.com/Salmonid-species-galleries/Videos/
  4. As well, you can also order from my Smugmug based website. Metal prints are an option but they are the most expensive type of print. If you want much less expensive go for paper prints, which might be shipped rolled up in a mailing tube, also cheaper.
  5. Another Nikonos starter. This was a few decades ago! I did not use it for diving, however. When I started doing UWP while diving it was a medium format housing.
  6. I use Smugmug. It checks off all your boxes except for blogging. One of the reasons I selected it was because of formatting for different devices. Smugmug provides an app for Lightroom making it very easy to add and subtract images. There are various gallery formats to choose from. I am using two of them. One, journal, shows the images at a large size that one can scroll down to see other pix. This is good until one has several pages - I find that not many go to the last page. So for large galleries (more than about 100 pix) I use a horizontal matrix option. This option also has a starting pic. I do not like the way smugmug generates watermarks so I generate them during the export from Lightroom. I have changed them slightly over time so I can see which pix have not been processed lately - it is easy to replace them - it is semi-automatic. One just has to work on the image in the develop module and then update the gallery with one click. One can set the max resolution by gallery. I am not using full size but this is an option. It has the right click block as an option for each gallery. Smugmug also provides site analysis so it is possible to see which images and galleries are most popular. One can dive in and see which sizes are being looked it and what sort of device as well as OS. A surprising number use their phones.
  7. A diopter is needed when a lens on its own is incapable of focusing on the virtual image generated by the dome. For example a lens with a 0.38m minimum focus distance may not be able to focus when using a dome smaller than a superdome. I have not determined if the S&S corrector changes the field of view angle; if so it must be slight. My experience is that a 16mm with the S&S corrector attached is still a quite wide angle of a lens.
  8. The S&S correction lenses we are discussing are NOT diopter lenses. They have in common being a piece of optical glass mounted in a threaded rim but any similarity ends there. I assume the cost has a lot to do with the R and D and the expected relatively low volume of sales of the product. As well there is an aspherical surface. The optical glass could be a more expensive type.
  9. 1. The correction lens was design to be used with 16-35mm zoom lenses made by Nikon and Canon. The largest deviation of the virtual image from the focused distance (assumed to be a plane) is at a corner. Therefore one can assume it is really made for the angle of view at 16mm so should work with other lenses of similar angle of view. As well it was designed for a specific Sea and Sea dome port that is large (I have not actually held this port). This is what the correction lens is designed to work on which is what you surmised. I have been using it with both C and N 16-35/4 zooms and a Seacam Superdome port which is also a large port but not an exact match to the design. The two sizes are to accommodate the different lens models. The current Canon f/2.8 16-35 (version III) uses the larger 82mm filters. I have not shot it. aside: {The earlier versions (I and II) have a bad reputation - I have not shot those either. I suspect the main reason for the 2.8 versions is for better AF and AF started with just one AF point in the center. Earlier lenses were probably designed to make AF better by maximizing MTF in the center. Hence these older lens are not so great in the corners.} 2a and b. Correct. The critical point is the entrance pupil which is typically a few lens elements deep into the lens. This website goes into this in detail: http://www.pierretoscani.com/fisheyes-(in-english).html I gave the English link. There is even more in French. Look at the animations (on the English page) and notice how the entrance pupil changes with angle of view with the different lenses. It moves along the optical axis and can tilt as well. Fisheyes are quite different from the non-fisheyes in the direction of the shift. I believe this is part of the problem with domes. When the lens is stopped down one is chopping off part of the problematic part (part away from the optical axis), hence we need to stop down.
  10. I would not use either of my 16-35mm lenses without it. Yes!
  11. f/2.8 does work better for AF with SLRs in many cases. However I have successfully used f/4 lenses in fairly dark water in much of my salmon photography. I use a focusing light after dark to help. Newer SLRs work a bit better but I have not done scientific tests. Mirrorless is a different story. With the Nikon Z the lens is stopped down to f/5.6 when set at f/5.6 and smaller apertures. One does not see the max aperture view in the viewfinder like an SLR when the lens is at f/5.6 and smaller (assuming an automatic diaphragm lens). Since we use smaller apertures when shooting under water, especially with wide angle and dome ports, the increased aperture of f/2.8 over f/4 becomes academic for focusing.
  12. This lens is collapsible like the 24-70 kit lens and some vintage Leica lenses. The photo on the left shows the lens in the collapsed state - zoom ring lined up with the dot to the right of "14" seen in the photo on the right. One cannot take a photo with the lens collapsed (reminder message shows up if ones tries). This difference in length is thus unimportant as to fitting behind a dome. It is useful for taking up reduced space when stored, which might be important for dive travel. What is unknown to me, however, is how much length changes when zooming actual focal lengths. I have not looked at all the on-line videos to find out. Many lenses in this zoom range do not change all that much in length.
  13. The 17-35/2.8 was discussed on this forum ad nauseam a few years ago. Look back a decade or so. A number of those who owned and used this lens switched over to the 16-35/4. They voted with their wallet. I have both Nikon and Canon 16-35/4 lenses. I only use them with superdomes and now (since it came out) with the Sea and Sea corrector. They work well with these conditions. I have a Z6 and have used some of my of AF-S lenses with the FTZ on it. Mainly the 50/1.5G and 300/PF. They work just as well as on a DSLR and maybe even better. For example I was using the 50 in MF mode to shoot fireworks as well as stars at night. Very easy to MF with EVF. One button press to 100% then back to normal (I have the lower one on the front programed to do this). Plus the EVF is much brighter since it is electronically compensated for the dark. Back screens on SLRs are not so good for focusing for us old greybeards with more limited closeup vision (compared to what it was) and very hard to see in daylight. That said for underwater action I suspect a DSLR is still the champ. Maybe in a few years we will have a FF mirrorless sports camera that works as well.
  14. The clouds parted today so tried free-lensing the Nikonos 15mm using a Leica M adapter as a spacer and an aid. To get this shot the lens was a few mm beyond the adapter. A bit awkward to hold with the knobs on the lens so far from perfect alignment. Where it was comfortable the lens shade was in the wrong position! Quite sharp in the center. Obviously blurry towards the edges. Not a topside lens!!
  15. This should be easy to do since the sensor plane is very close to the lens mount - a lot of room to fit an adapter. However if a housing will fit the FTZ inside the housing it may not be so easy. So a better housing design to use Nikonos lenses would fit the FTZ within a port extension. This would require longer gears for zooming and or focusing (to engage within the housing) so old ones may not work. Just for grins I am attaching an underwater shot done with the Z6 but without a housing! I was testing out the Laowa macro probe that is waterproof about halfway along its length. In a nearby stream where salmon spawn (not this time of year!).
  16. The distance from the adapted port mount to the sensor plane (or other reference plane on the camera body), or registration distance, would have to be the same as a Seacam housing. This is not seemingly likely as this is not claimed in the adapter description: https://www.nauticam.com/collections/port-adapters/products/adaptor-for-seacam-ports-custom-part Note that there is a slight port extension to the adapter The native Nauticam port mount registration distance would have to be less than that of Seacam by this amount of port extension for it to work as you want. It may be possible for Seacam to supply the port part with a Nauticam mount instead of Seacam.
  17. Best wishes to the Wetpixel community this Christmas 2018! Tom
  18. Interesting question! I have not tried a polarizer under water but am curious as to the results. Light under water gets scattered quite a bit so may not be as polarized as above water. The main issue might be adjusting the angle of polarization of the filter. This may be easier to do with the EF lens adapter for filters that Canon is releasing for the RF and may be the most compelling reason to buy an RF! At this point I have not but do have a Z6. RF housings will need to have the facility to adjust the filter in the adapter. The control is more like a command dial (on a camera), not like an aperture or zoom ring, so a simple ring will not work.
  19. You might want to look into S6 connectors as the cables are double ended (same connector on each end). S6 cables and bulkheads, however, are expensive. You might be wondering about something similar with the other types?? One solution would be to buy two Ike extension cables and cut the ends off you do not want (female - like the bulkheads) then combine the two remaining parts yielding you an extension cord with the connectors you want (male) and getting an almost twice as long cord. You would have to use Ike bulkheads. There are kits available for making a waterproof wire to wire junction or you could fake one. First make a VERY secure soldered connection which you would encase in epoxy using a mold of your making. PS. I have not actually seen one but Ike makes synch cords to use their strobes with their housings so would be Ike, maybe same sex, on both ends.
  20. Yes it is possible to buy bulkheads and install them yourself. I have done so for my Seacam housings to install remote control. I bought my bulkheads from the US distributor. You may be able to do so for your housings as well. You need to be aware of the specifics needed for your housings. There are different sized holes and threading. Seacam uses metric sizes for both. Others may use inch based sizes. Also, one can get bulkheads for S6, Nikonos (N5, maybe even N3), Ikelite, or EO (wet connector). EO bulkheads are not very common these days but once were the standard. There are a few other types of bulkheads as well such as the one Hasselblad used in their blue housings from the 70s. Pentax used a Nikonos II bulkhead in their 6x7 housing.
  21. I am curious how the well the R will work housed. Many camera controls seem to require one to swipe or touch the monitor screen to make a change on the R. I have the original Eos M that is very much like this. It took me a while to figure out how to change ISO for example. One has to be in shooting mode (touch the shutter release). On the plus side one may be able to use the lens control ring to make one adjustment (at a time). This will require a control gear (up to three for one lens - zoom, focus, and control ring). Nikon has just 2 thus far. I am curious how the dedicated mirrorless lenses work behind a dome port especially as you have given the thumbs up on some of your Sony lens reviews, Phil. Tom
  22. Based on my recent experience it is best to post square images. Recompose them yourself or you may see undesirable results. If one clicks on an image one will see the image without cropping but this requires a bit of effort (lots of clicking). It is much easier to scope out what is there by looking at pix in the default grid. I am using the Lightroom app mentioned back a bit in this thread. No major issues with workflow. However, one needs to delete an image and then undo the deletion and re-upload to see edits. Not quite as smooth as other LR apps.
  23. I use both systems. The main reason being historical. Nikon had the early advantage because of the Nikonos line and its legacy. The standard bulkhead is still Nikonos. It (the final iteration) was designed for film TLL. UW strobes also came with TTL that worked directly on Nikon film cameras. Canon preceded Nikon with full frame (FF), 24x36mm, sized sensors. The first 2 models were very expensive (US 8K each), then the 5D came out... Finally Nikon came out with FF for their 3rd generation dSLRs, the D3 series. As well there have been differences in their lens lineups important for UW. Nikon had an APSC fisheye lens (10.5mm) whereas Canon did not, not even an APSH one. Finally, they came out with their 8-15mm that provides a fisheye for all 3 formats (FF, APSC and APSH). It has only been in the last few years that Nikon came out with an 8-15mm. While their 16mm fisheye lens is good (I have one), it does not focus as close as is needed for some UW applications. Canon is deficient in the 60mm macro department. Their 60mm is only for APSC. If one wants to use a modified Nikonos RS lens one needs to use a Nikon body. There are pros and cons to both systems. It is nice to have some topside capability too. Canon makes two AF pancakes, a 24mm and a 40mm, that I take along with a 100-400mm zoom and a 7D2 for travel that I use alongside a Canon FF body for UW. If I travel with a Nikon (to use a Nikonos RS lens) I do not want bring the 7D2 since the lenses are not interchangeable. So on my last trip I brought along a second D3X body for topside shots (maybe not the best for this). I plan on using a Z6 for this in the future. However, Nikon does not make any pancake AF lenses. Pancake lenses are good when one is space limited. I use FF for UW because of high ISO ability for shooting in home waters, Alaska, where it is darker than in the tropics. I use the big bodies because of the big batteries because of the cold temperatures. Your needs may be different. Now that things are moving mirrorless.....
  24. Here is a good beginner tutorial: https://reefphoto.com/blogs/lighting/i-want-to-add-a-strobe-to-my-housing-what-arms-do-i-need
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