Light pollution filter for canon 50mm lens

[peteftm]

Hi , ive just received delivery of a canon 50mm f1.8 11 (nifty 50).

I've noticed the front of this is threaded so would this take a 2 inch light pollution filter? (Looks about the size but aint measured it).

I plan on doing widefield imaging mounted directly onto my EQ5 ra driven mount.

Cheers

Peter

[Stephen]

No, you need a 50mm to 48mm step down ring, then you can attach the 2" LP filter

[peteftm]

Thanks for that , i'm looking at a cheaper option to the cls clip filter , although i may get better images with this...

I'm planning to go to darkish sites but i've got a feeling LP will be present there as well!!

Peter

[Earl]

I think i have one of those (step down adapter) lurking in my bits box ill have a look later

[Stephen]

I think i have one of those (step down adapter) lurking in my bits box ill have a look later

Props to Earl if he can supply one, but they are only about £5-£8 new.

[peteftm]

Many thanks for your help :-)

[Earl]

its a 58mm-48mm it fits trhe 18-55 lens fine, not sure on a nifty.

[peteftm]

Mmm thanks for looking :-) Think i'll save up for a clip filter then i can use a lot of older lenses.

Peter

[Earl]

worth it there very good i used to have one

[rfdesigner]

Hold on folks.. there's a problem

Been there with a Lumicon Deep Sky filter...

The filters work with light up to a certain angle, beyond that the wavelenth of operation really start to shift.. If you use a 50mm lense with a full frame SLR/DSLR then the angle of light in the corners means you get really weird colour cast towards the outer half of the frame.

IMHO for full frame DSLR/SLR you need to go >=100mm.

If using the small imager size DSLRs 50mm works out as equivelent to about 85mm fl on full frame.. so you might just get away with it.

Derek

[todd8137]

HI before i got a clip filter i just blue tacked the 2"filters on the front of the lense you all may lol but on the 28/80mm for wideangle shots it worked a treat

[Stephen]

HI before i got a clip filter i just blue tacked the 2"filters on the front of the lense you all may lol but on the 28/80mm for wideangle shots it worked a treat

[todd8137]

may a just add not directly on to the lense around the thin edge of the lense take a look at my blog "start of my mega wide field shot "

[peteftm]

I travelled a few miles from the glare of street lights last night and took this 2 minute sub.This was using my nifty 50 and as you can see i deffo need a lpf!

Is the astronomik clip filter the way to go or would a cheap skywatcher do the trick , bearing in mind i would be finding darker places to set up?

Thanks for the help by the way

Peter

[jgs001]

I use the clip filter with my non EF-S mount lenses. It's a much better lp cut out than the SW one.. Don't get me wrong, the SW one does work well and I use it in my scopes, but they are much slower than the 50mm.

[peteftm]

mmm i suppose i'm looking for a cheap option! Think i'll start saving for the cls though

[swag72]

There was a link in 'heads up' earlier about a clip in filter on Astrobuysell for £100.