Canon RF 20-50 F4L for Underwater

1 hour ago1 hr

Canon just announce Canon RF 20-50 F4L https://www.canonrumors.com/canon-officially-announces-the-rf-20-50mm-f-4l-is-usm-pz/.

With MFD of 0.24m, do you think this lens will work with WWL-1B? Or it should work better with 140mm or 180mm dome? I'm looking for a compact rectilinear wide-angle setup for Marelux housing.

Thanks in advance for your opinion.

Share on Facebook

Followers

Go to topic listing

Over 50 and still diving? (Go on, admit it....)
Over 50 and still diving? (Go on, admit it....)
TimG · October 31, 2025Oct 31

On a recent dive trip I met someone who is writing a dissertation on people who are 50+ and diving. If you are interested in contributing, the following is a link to a simple questionnaire which takes about 5 minutes to complete. I've become paranoid about online scams, phishing etc. But this looks fine and I know the author - and the information gathered is pretty innocuous. https://forms.cloud.microsoft/Pages/ResponsePage.aspx?id=e3VPRDDLUkaTvMqNbR74E5Cna1DJ6d1KvM2oRz5_gAdUM0Y3UEpYTkZERDJON
TimG

October 31, 2025Oct 31

Onokai

Sunday at 01:40 PM3 days
- 27 comments
- 3,440 views
Adobe Lightroom Classic: yes another update - v15.3
Adobe Lightroom Classic: yes another update - v15.3

TimG · April 16Apr 16

There's yet another update to LR Classic - to version 15.3. According to the Adobe website, this includes background Al feature processing, performance improvements, a new Al culling model, PSB file sync support, film-inspired presets, support for opening images in Firefly Boards, support for newly released cameras and lenses, bug fixes, and more. Hard to keep up with all the updates!
TimG

April 16Apr 16

TimG

April 16Apr 16
- 0 comments
- 528 views
Conservation of Orcas and Chinook salmon in Southeast Alaska
Conservation of Orcas and Chinook salmon in Southeast Alaska

TimG · December 20, 20232 yr

With thanks to Conrad Gowell (DriftC) for this article: A legal victory for the Wild Fish Conservancy (WFC) marks a turning point in the protection of Orcas and Chinook salmon in South-East Alaska https://wildfishconservancy.org/wfc-legal-victory-marks-turning-point-for-southern-resident-orcas-and-wild-chinook/
TimG

December 20, 20232 yr

Dave_Hicks

April 15Apr 15
- 5 comments
- 1,751 views
Nikon Z9 firmware update to v5.32
Nikon Z9 firmware update to v5.32

TimG · April 8Apr 8

Nikon announced on 31 March a firmware update to v5.32 for the Z9. Nikon's Download Centre explains the update does the following: • Changed the way the aperture was adjusted on a lens when the standby timer expired. • Fixed an issue where the camera would sometimes stop responding if a picture was zoomed in during filtered playback while FTP upload was in progress. A link to the firmware is here: https://downloadcenter.nikonimglib.com/en/products/589/Z_9.html
TimG

April 8Apr 8

TimG

April 8Apr 8
- 0 comments
- 453 views
DIY Fibre Optic cables - Easy!
DIY Fibre Optic cables - Easy!

TimG · December 21, 20232 yr

DIY Fibre Optic cables Like most members, when I bought my first system that used fibre optic cables, I paid for the ones that the dealers sell. Reading various articles about fibre optics, I realised later that they were relatively easy to make and that DIY cables could cost a fraction of shop-bought. I gave it a go. I thought it worth a write-up here on Waterpixels. And yes, they are really easy to make and are cheap. The Cable The best fibr
TimG

December 21, 20232 yr

Mike Saunders

March 29Mar 29
- 16 comments
- 20,574 views
Diving with the Weefine 3000 CCW Ring Light
Diving with the Weefine 3000 CCW Ring Light

bvanant · June 10, 2025Jun 10

I have long fascinated with shooting ring lights underwater starting with the Inon Quadflash, through the various Athena modifications to Sea and Sea strobe heads, continuing to the Saga fiber optic rings and now to the Weefine 3000. The Weefine 3000 is the latest version of the LED lights made by Kraken and Weefine. The Weefine 3000 CCW Weefine 3000 CCW Ring Light It's similar to the earlier 3000 lumen LED modules but has adjustable color temperature and a 3000-lumen burst (strobe) mode. It
bvanant

June 10, 2025Jun 10

Mike Saunders

March 27Mar 27
- 16 comments
- 8,874 views

Canon RF 20-50 F4L for Underwater

Featured Replies

Who's Online (See full list)

Thanks for your support

Latest Articles

Over 50 and still diving? (Go on, admit it....)

Adobe Lightroom Classic: yes another update - v15.3

Conservation of Orcas and Chinook salmon in Southeast Alaska

Nikon Z9 firmware update to v5.32

DIY Fibre Optic cables - Easy!

Diving with the Weefine 3000 CCW Ring Light

Important Information

Account

Navigation

Search

Configure browser push notifications

Chrome (Android)

Chrome (Desktop)

Safari (iOS 16.4+)

Safari (macOS)

Edge (Android)

Edge (Desktop)

Firefox (Android)

Firefox (Desktop)