The bumpers are cool. Diffusers are different colors. There’s a crease in the background. Strobes have their asses cut off.

Looks like you've swapped a HF-1 filter diffuser with Retra diffuser and put them on different strobes.

I'm with Chris. A Retra diffuser cunningly fitted to the Backscatter strobe. Fiendish.

The flat diffuser from Backscatter that is on the Retra strobe seems to be the 4500K one. What color temperature does the Retra dome diffuser, mounted to the HF-1, have?

Edited 20 hours ago20 hr by Architeuthis

I made a pair of adapters for Retra and HF-1 that allow the use of accessories from the other brand.

I have warming filters more mounted in the photos, but you could put an LSD on the HF-1, Backscatters Floro filter on the Retra, etc. Mix and match accessories.

Edited 19 hours ago19 hr by Dave_Hicks

57 minutes ago, Architeuthis said:

The flat diffuser from Backscatter that is on the Retra strobe seems to be the 4500K one. What color temperature does the Retra dome diffuser, mounted to the HF-1, have?

They should be about the same. The strobes are very close in color temperature and the filters both target 4500k.

1 hour ago, Dave_Hicks said:

They should be about the same. The strobes are very close in color temperature and the filters both target 4500k.

Interesting that both are nominally 4500K. In your side by side photo the Retra looks clearly cooler (but maybe the Kelvin designation refers to the output at the end and the spectrum of the Retra strobe is different to the HF-1)...

The design for these adapter models has not been published:

https://makerworld.com/en/models/2391114-adapters-for-retra-and-backscatter-hf-1-strobes#profileId-2619513