Adventurer

The Canon EF-S 60mm Macro is a very affordable and pretty much underestimated macro lens. The above, written by Chris is true for Canon Mirrorless full frame bodies, as the Canon MILC will auto-switch to 1.6x Crop mode. There is a work-around for this, by setting your desired aperture first and then slightly unrotating the lens from the bayonet. This will trick your Canon to consider it as a manual focussing third party lens. Surprisingly it will only exhibit very little vignetting on a full frame sensor. But you have to live with using it as a fully manual focus + fixed aperture lens throwing the very fast and silent AF of this lens over-board. Sony, MFT and Nikon users can adapt this lens with full AF features and will have it working as a full frame lens with slight vignetting in some focus positions. Ahh,.. and if you intend to use it for video the 16:9 aspect crop will also help to get rid of the dark corners on a full frame body.

Wow, what a statement and test series.

Welcome Don, great you joined. Looking very much forward to your posts and thoughts and contributions! ..especially first hand reports in the OPP thread.

Interesting, at least one more lens on the Sony front. You do not know by any chance if they also offer it for Canon Lens and which one they decided to pick ? ..would be interesting to see the progression of this system. My personal opinion is that if you go for rectiliniar lenses and wider than approx 20mm focal length, things are likely to look odd / weird underwater, even if the lens has been well corrected behind a dome or OPP style optic. It would have been very interesting if @Alex_Mustard would have elaborated more on what zoom level the presented images in the video were shot and how much he cropped in each RAW. Especially the sweet lips shots and some other look to me like he is not at the ultra wide end of the setup. I also think some of Don Silcock's initial sample images - which were heavily debated at DEMA and in the community - suffered a little bit from shooting this too wide. But I may be wrong, would be interesting to see a follow up in the show and in more detail.

Good news everybody! The lens has already made it to optical bench hub: https://www.photonstophotos.net/GeneralTopics/Lenses/OpticalBench/OpticalBench.htm#Data/US20260029629_Example06P.txt,figureOpacity=0.25,AxisO,OffAxis Two some very good indicators that suggest it to be a good uw candidate: 1.) Entrance Pupil just moves 4.35 mm during zoom 2.) Just 42mm front glas diameter (will work with many water corrective optics) 3.) Minimum subject distance in Front of the lens = 123,2 mm = 12,32 cm 94° diagonal FOV @ 20mm behind a dome

Here is how I would rank it, IQ sharpness wise: 1.) RF 24-105 STM (the sharpest!) 2.) Canon EF 8-15mm with original EF-RF Adapter 3.) Canon EF 8-15mm with comlite EF-RF Adapter (I have not shot this combination, as the comlite seems to exhibit some dismal AF performance compared to the Camon EF-RF adapter already on land) - so this is a „I suppose“ line 4.) Canon Fisheye 8-15 with original Canon RF-EF adapter and Kenko 2.0x TC 5.) Canon Fisheye 8-15 with modified Comlite RF-EF adapter and Canon RF 2.0x TC

I am happy Canon made this lens. 20mm is the sweet spot before rectilinear lenses start looking odd. I hope the lens design pops up on optical bench soon, so we can have a closer look.

Having done a few more snaps in the field and tightly comparing the sharpness of my lens line-up, I must conclude: Newer RF lenses are more razor (sharp) than older EF lenses. This basically confirms also various land based tests I churned through on the internet. Surprisingly my RF 24-105 STM is the sharpest lens in my lineup and it outperforms the EF 8-15 fisheye in overall IQ sharpness on average. I even think the RF 24-105 is sharper than the Canon RF 100 mm macro behind a flat port on many occasions. Also I am currently under the impression that the EF 8-15 combined with the Kenko 2.0x PRO TC performs better than with the RF 2.0x comlite adapter.

@TimG my condolences! What a nightmare. I hope you are not too traumatized by the experience and the gear loss aftermath.

So you made the jump to new strobes @waso … were you already able to take them out for a test drive ? … interested to see your first results with them soon.

Similar complaints from my better half here, too. She usually says something like: „Oh nooo, are you going to watch Shrek again,… ?“ before she leaves the room. 😅 🥴

Looks like that is what they added to the the 2.0 version of the apollo S strobe.

I do not use Apollo S myself, but according to marelux the Apollo S 2.0 has two dedicated switch position on their left rotary dial called M-PRE and M. The M-PRE position should do what you are looking for and cancel out the preflash. M-PRE is supposed to fire out just one flash. They have this on their Apollo S and Apollo Y but not on my III 2.0.

Ehhhrmm,… which sony are you talking about? Your sony A6400 ? … should not be an issue with that one. Furthermore I am pretty sure all their Apollo strobes successfully handle pre-flash. If I wanted manual strobing on my Apollo III with preflash in my cam I will simply put it in MTL mode.

Very nice read @Alex_Mustard ! Given that Don Silcock tested the prototype for approximately one year, the official announcement was back in November 2025, and we are now in April 2026, it is a little disappointing that only one lens in the Nikon system still appears to work with Seacam’s OPP. That probably says something about both the technical complexity of this optic and the level of commercial demand for it. I really hope Seacam succeeds in expanding compatibility to more camera brands and, even more importantly, to a wider range of interesting lenses.