Phil Rudin

It has an A setting on the aperture ring allowing it to be controlled from the camera.

All modern strobes, if you go back decades perhaps not. I think it would be a little presumpus to say every single strobe.

I was advised today that this TTL trigger works with most all TTL strobes.

I would not recommend the Sony 20-70mm behind a flat port because other choices are so much better. I have tested the Sony FE 28-60 with the flat port using CMC-1 and two CMC-1's stacked. Remember the 28-60 only focuses to 30cm with 1:6.25 magnification so the added closeup lenses only get you to about 1:2.5. If you are looking for more magnification than the 20-70 or Sigma 20-200mm give you the macro range of lenses are a better choice with the Sony FE 100mm F/2.8 being the best followed by the Tamron 90 and Sony 90mm's. Regarding the Sony FE 50mm macro now well over a decade old my recommendation would be the Marelux MV-60 or if you want everything Nauticam the MFO-3 on a flip adapter for both super macro and wider on the same dive. The MFO-3 works from 0-150cm while the MV-60 works from 0-infinity, the reason Tom Kline got his for the added distance.

This lens is now available in the online store for $449.00USD. Christopher Frost has posted a Youtube review and states the corners are better from around F/2.8 to F/11 than the manual FF version he tested. No way to mount filters but overall not bad for the price.

Yes If you are using it in one of the listed housings.

Like the triggers from UWT and Turtle the Marelux flash trigger is designed for the most current Marelux housings and Marelux line of strobes. This current version does not support the HSS function in the Apollo strobes. The trigger is fast enough to shoot at 20+ frames a second and it is a plug and play configurations.

The photos are with the Sony FE 20-70mm F /4. I now have a 180 port in house and will be testing the Sigma soon. The OM 12-45mm F/4 is a 1:4 lens so about the same as FF at 1:2.

Hi Fred, I have been following your quest for useful insight and this is my take. Most fish are larger than 1cm and will fit into a 1:2 minimum focus distance frame. The 90-105mm macro lenses are most useful for images from the minimum 1:1/1.4:1 hangout to about 1:6 before you are putting to much water between the lens and subject, vis is a contributing factor in some cases. So while I wholeheartedly endorse the Sony FE 100mm as the best macro lens on the planet, (I have one with 1.4 & 2X tele converters) I believe you have a chance of a wider range of subjects with a zoom lens. The attached photos were taken with the Sony A7R V in Marelux housing with the Sony FE 20-70mm F/4 lens using a 180mm dome port. This lens has a 1:2.56 minimum magnification. The camera is 61MP so cropping is no problem for your use I would think. Marelux and Nauticam both support this lens with a zoom gears. Marelux uses an extension ring 50 and Nauticam uses the N100 to N120 35.5 port adapter II and extension ring 35 with the 180mm port. This is a $1200.00 Sony lens. With this lens you would really shoot at less than about F/8/F11. While I have been very happy with the Sony 20-70mm when I know I will be dealing with a verity of subjects sizes I have now found what I consider to be an even better mousetra, the Sigma 20-200mm F/3.6-6.3 DG a $900.00 lens. This is a lens that at this time is only supported by Marelux with a zoom gear. What makes this lens unique is that it focuses to 1:2 from 28 to 85mm behind the 180mm dome and can extend out to about 130 to 150mm before it quits focusing because it gets to near the dome glass. Additionally the Sigma will stop down to F/40 in the macro range. My guess is that I am older than you Fred and I have been using the Sony A7R VI, A1 II and A7C both II and R all with Marelux housings and dual Marelux Apollo S and Apollo Y TTL strobes. Like some other strobes in the market these include HHS which solves the /1/160th sync to a degree, TTL, and multi frames settings. If you decide to go with the A7C II/R I have a like new Marelux housing and very low milage A7C II and A7C R camera bodies for sale.

Today 7Artisans has announced on its Facebook site that the AF 10mm F/2.5 MAX fisheye will be released on August 27/GMT+8 for $449.00USD. The post does not indicate if the lens will only be sold on the & artisans site or if it will be in online stores like B&H Photo.

Marelux lists the RF 20-50mm PZ on the Aquista 135D lens chart with a zoom gear (#51211) and an extension 30, so zoom range from 28mm to 50mm. I don't see the lens on the port chart yet but my guess is that the extension 30 with a 180mm dome port would be a good starting point. As a side bar, Marelux has also added the new RF 7-14mm fisheye zoom with zoom gear #51210 and extension ring 30 with the 140mm dome port with bayonet dome shade.

Thanks Davide but I still believe in written reviews, not chat GBT and most of these companies are looking for YouTube talking heads.

The new 7Artisans full frame AF 10mm is an F/2.5 MAX fisheye lens. MAX seems to be a new line of high end lenses that have aperture rings, function buttons, weather sealing and more. This is one of the worst lens rollouts I have seen in some time. No information released in English, no lens reviews found on Youtube in any language and no updates after being announced in China. Further the lens in Sony FE, Nikon Z and L-mount was listed on B&H for close to three weeks with a notation that B&H was waiting for a price and release date so they could take pre-orders. Two days ago the lenses were removed from the Q and are no longer listed on the site. Not a good start after all the hype 7Artisans had gotten.

Marelux has the Canon 7-14mm fisheye listed on the port chart with zoom gear #51210 and extension ring 30 for the 140mm dome port.

I think the Tamron 12-20mm will be well suited to U/W work simply because at 12mm if will focus to 18cm. With the proper extension it should work well behind domes in the 200mm and larger range. This is not the case with lenses like the Nikon Z 14-24mm F/2.8 and Sony FE 12-24mm F/2.8 GM that only focus to 28cm. Another excellent very wide lens is the Laowa 12mm F/2.8 AF for FE & Z. This lens will focus to 14cm and is usable behind a 140mm dome with proper extension. This lens is much less expensive than the 12-20 at $699.00. If you want a less expensive fisheye that natively mounts on Nikon Z checkout the 7Artisans 10mm f/2.5 AF MAX Fisheye Lens (Nikon Z).

The OP specifically ask about the Laowa 15mm for CFWA. If you are not aware this is a full frame lens. Nikonos lenses were also mentioned and they are full frame lenses. In addition for Nikonos lenses you need an adapter only made by Nauticam for sony full frame cameras. cameras. The images were taken with the AstrHori in a Marelux 140mm dome port which is simply a fact, this is a port that can also be used on Nauticam and several brands. If you would like to start a thread regarding unsupported M4/3 lenses I would be happy to help with that. Housing brand has little to do with camera/lens combos as most work in many different housings with proper extensions.

I have tried a verity of manual focus lenses behind a verity of dome and flat ports, including the Laowa 15mm 1:2 macro. I found the Laowa not to be worth the effort. Wide lenses like the 110 degree AOV 15 Laowa need to be to close to get to 1:2 inside a dome port. With wide primes you have the cost of the lens + the custom focus gear and in the case of the 15mm Laowa you would still only be able to get to about 1:4/5 behind a 200mm dome or larger dome. You would be able to do the same or better with the 112 degree 14mm F/4 Viltrox which has a more achievable 1:4.35 magnification at a minimum focus distance of 13cm. The lens retails for $199.00 in the US, got mine on sale for $159.00 on sale and works with Sony FE and Nikon Z. I have also used the Sony 14mm F/1.8, Sigma 14mm, Sanyang/Rokinon 14mm AF lenses and the cheap Viltrox is every bit as good in a dome because of its close minimum focus. Same/same with the Rokinon 14-24mm F/2.8 which has a minimum focus of 18cm, all the other 14-24mm lenses and 12-24mm"s focus to 28cm which is a disadvantage behind a port. The Rokinon is also the only lens that can be used with 77mm front filters. I used the AstrHori 6mm F/2.8 220 degree circular Fisheye, a manual lens in Bali last year pre-setting the lens at F/11 and just shy of infinity on the focus ring. This gave me around 8 inches to infinity in a 140mm dome. This lens can be had for Sony FE, Nikon Z, Canon RF and L mount systems for a retail of $299.00 US. If you are looking for cheap options to expensive lenses like a Canon or Nikon 8-15mm or 7-14mm for circular Fisheye this is a fun alternative. I have tried a lot more to numerous to list. Images from AstrHori in 140 Marelux dome.

Both the Nauticam and Marelux lenses have a 0.9X max magnification and on full frame are generally assumed to be suitable for 90mm, 100mm and 105mm macro lenses. So AOV's of 27 degrees, 24 degrees and 23 degrees. With the MFO-3 and MV-60 in place the result is an AOV of around 47 degrees+/-, 40 degrees and 38 degrees. Nauticam states it was tested with the Nikon Z 105mm macro and has a working distance of 0-1500mm or 59 inches. The Marelux MV-60 was tested using a 100mm macro so 24 degrees and 40 degrees with a working distance of 0-infinity, spec's from each websites. I am sure many will say that shooting beyond 59 inches/1500mm is a waist of time however what shooting to infinity points out is the large difference in lens design between these two lenses. My guess is that having a flat front element allows the MV-60 to focus to infinity while the curved front element of the MFO-3 restricts working distance. This may also explain a difference in AF speed although this is purely speculative. Different camera systems have a wide verity of AF choices and to have a relevant comparison you would need to be using the same system with the same AF setting I would think.

I can answer some of these questions about the Marelux MV-60 V. Nauticam MFO-3. Weight, NA is 602g and 120g negative in water. MX is 535g and 35g negative in water. NA has a curved front glass and MX has flat front glass. The Marelux front lens appears slightly larger in diameter and because the front optic is flat it allows 77mm threads on the front of the lens so you can direct mount filters and a lens cap without need for an adapter. Regarding cost the Nauticam MFO-3 retails for $730.00US and the M82 filter holder is $57.00. The Marelux MV-60 retails for $599.00. The MV-60 ships with a neoprene storage bag, front and rear caps and a spacer for direct mount to a 67mm flat macro port. I have never seen the MFO-3 but assume it includes the same items. Both work on flip adapters and can be interchanged between NA or MX adapters depending on which flip you own. Regarding the IQ and AF performance I have no opinion because I have never used the MFO-3. The second photo is the new Marelux housing for Sony A7R VI with the new MX double flip adapter. You can see it works with both MX-macroview and NA-closeup lenses.

This a combination I borrowed from Nauticam and tested several years ago. When I did my first NA-WWL-1 review(issue #114 at uwpmag.com) this is the lens I used with Sony full frame. At the time the Sony 28-60 did not exist and this was by far the best lens for overall IQ well exceeding the 14-42 lenses I tested on M4/3 cameras. The big problem with this combo is first cost, new the 28mm F/2 lens is $498.00 and the 16mm fisheye converter is $348.00. Today you have options new that will give better results and about the same price or less total price. Second is minimum focus distance, the lens focuses to 29cm and with the converter it goes to 22cm. By today's standards this is not ideal when most newer fisheyes and fisheye zooms focus in the 15/16cm range. This may not seem like a big difference but it can cause focus issues behind small ports and as you have experienced vignetting. The F/2 number also changes to F/3.5 much like using a tele converter. Bottom line is if you already own the gear you can make it work but I would never recommend this combo or the or the 21mm W/A converter that only auto focuses to 24cm.

This seems like a bit of overkill to me unless you are paying $57.00US to actually use an 82mm filters like an ND or other. Just to add a cap to protect the glass can be done easily by adding a neoprene cover like a soda can cozy or like.

It works without the ring on the Marelux flip just as it would on a Nauticam flip. The $299.00 price is attractive as well.

Hi John, I am Marelux Senior Advisor and I can assure you that both Marelux and Nauticam in this case were wrong. I used the NA-flip with MX & NA C/U lenses until it broke on my last trip to Bali. Both NA & MX C/U and MV-60/MFO3 are in fact interchangeable between system flip adapters as well from both manufactures. They have different ways of making the spacers but both with respective spacers can also be direct mounted to ANY 67mm flat port. The newly designed Marelux double flip has the advantage of the Patented hydraulically balanced damping system which flips smoothly without sagging and has an optimized sealed rotating shaft which allows smooth rotation without jamming after thousands of flips. Photos shown are the Marelux Sony A7R VI housing with Sony 100mm macro port and double flip with Nauticam SMC-1 and Marelux MV-60. Also shown is the housing with MV-60 and MV-10 +10 C/U lens and the new double flip with the older style MX-single flip adapter.

Marelux has just introduced the new double flip adapter to complement the Marelux MV line of wet lenses including the MV-60 and MV +5, +10 and +15 closeup lenses. The new Marelux flip adapter has a hydraulically balanced damping system, flips smoothly without sagging and has an optimized sealed rotating shaft which allows smooth rotation without jamming after thousands of flips. This is another Marelux (Patented Design). Additional information on the new Marelux flip adapter and Marelux MV wet lenses can br found in the Product section under Optics at Marelux.co The double flip adapter retails for $299.00 on the US site. Images show the double flip (and older style single flip) on the new Sony A7R VI housing with the MV-60 and MV-10 lenses.

On the Canon RF port chart Marelux has 30mm's of extension recommended with the Canon EF 8-15mm and adapter. They introduced the 140mm dome with the bayonet shade for this lens which must be removed when at the 8mm circular fisheye end. For the new Canon RF 7-14mm I suggested 20mm's because Nauticam RF charts show 20mm for RF and they were also at 30mm for ef 8-15mm. I have ask Marelux to update the RF port charts for 7-14mm but they have not gotten to a zoom gear or extension size yet.