Cheap filters

[Steve Smith]

Filter Update

I have received my 3 pack of SFX with the gel filter to fit a Cokin P holder. The difference between this filter and my supposed 89B resin filter is huge.
When you look through the Ilford filter, you can see everything in a dark red/purple colour and you can see that foliage is lighter than other parts of the image. The only way you can see anything through the resin filter is to hold it up to the sun. In which case it appears as a dull red disc.
This confirms my opinion that the cheap filter is deeper into IR than the Ilford filter.
I was going to put them both on my D100 to see the difference but I don't need to. It is obvious that the D100 sensor is sensitive to IR at lower frequencies than the film.
As I said before, enough digi-nonesense, time to use some film (again). Hopefully with better results this time.


Steve.

 

[Bob F.]

Glad you resolved the problem: less pleased that the eBay advert was wrong in claiming #89b/R72 compatibility. Worth sending it back for a refund? He should refund your costs too as his advert has an incorrect description.

It sounds more like one of the #87 series which are, as you found, far too deep into the IR for SFX. I have an 87c that I used with the old Maco IR. Possibly the new Rollei film has similar sensitivity, but IDK.

Reassured to learn that photo-dyslexia is not just me ...

Cheers, Bob.

 

[Steve Smith]

Success!!!

Ilford SFX + SFX filter + Recommended exposure = perfect images!! (as far as exposure goes).

Despite wide bracketing in both directions, the exposures at f22 for 1/2 second in bright sun (equivalent to Ilford's f5.6 for 1/30s) seem to be the best. Although I have not printed any yet to be certain.



Steve.

 

[Steve Smith]

less pleased that the eBay advert was wrong in claiming #89b/R72 compatibility. Worth sending it back for a refund? He should refund your costs too as his advert has an incorrect description.

I checked out the listing and it actually says 'similar to 89B/R72' rather than compatible so I don't think I will bother about a refund.

Steve.