10 stop filter help

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Adam (if you couldn't guess...)
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Argh!

I received my lovely hitech 10 stop today so went for a wander to try it out and disaster!

lens_help.jpg



Now, I think this is one of two things

1. its some form of flare so how can i avoid it
or

2. I have just thought of but might be utter rubbish... because numbnuts didn't put it on manual focus, its focused on the reflection of the front element? (I say utter rubbish as surely it can't get that much in focus even on F22?



1DS mkii 24-70L
 
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Did you cover the viewfinder during the exposure?

Bob
 
Hi Derek,

That is what I figured after looking at it for a while


Bob:

No :-/ I didn't realize it would have that much of an impact though? (Was just a quick trial day)
 
Hah and have just realized how easy it would have been to cover the viewfinder, I totally forgot the 1DS has it built in :facepalm:
 
It may not be related Adam but there's achance that a bit of leakage got through to the back of the filter via the small aperture and gave rise to the radial patterns seen.

Bob
 
I have produced exactly the same effect with my Big Stopper (ooh matron...). I put it down to one of two things, failing to cover the viewfinder and allowing some stray sunlight to hit the top of the filter from behind. I haven't narrowed it down yet but since addressing both aspects I have not seen it again. My current best bet is light through viewfinder.
 
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Thanks all!!

I shall go out and attempt again tomorrow :)

I've also found I was catching the edges of the filter holder (Cokin P) at 24mm which I was really surprised about, I thought I would have to go a lot wider for that!

So I have just bast**rdis*ed one of my spare ones to make a WA adapter :)

Hopefully tomorrow will be more productive!
 
Hmmm so light leak from the gasket?

It's the 85mm with 3mm gasket in a cokin p so should be ok?
 
Hmmm have fitted it into my holder and the gasket doesn't seal at all, more research required me thinks!!
 
Looks to me like this is a duffer, the gasket isn't square and from everything I've read says it should fit the adapter fine :-(
 
I have this filter also.. are you sure the gasket thickness is good for the Cokin? I know they make a 1.5mm and 3mm, one of which is for the Lee which i have and i had to get the SWA Lee Ring for my Sigma 10-20. A great tip i got from a friend is have a small piece of sparkies tape stuck on where your flash is and just stick it over the view finder after focusing and adding the filter :) It sounds a bit ghetto but far better than messing about with the small viewer cover you get with Nikons as you have to remove the rubber viewfinder surround :/ Even the Canon one is fiddly compared to using the tape :)

It does seem like youve caught the reflection of the lens being stopped down to f22. Im surprised the AF has even worked with the 10 stop on. The fact that if you have dust spots they will usually show when using such a small aperture also.


Phil
 
Yeah the 1ds has the built in viewfinder cover, I just totally forgot about it!!

It didn't af with the filter on, I af'd then added the filter but because I was using a remote shutter I wasn't sure if it was trying to af again even with back button focussing on.

I've defo purchased the right one, I've triple checked that!!! But due to the 'springy' bit of plastic which helps hold the filter in place it isn't sealing.

I think what I'll do is add a small strip of foam to the holder to push it into place.... I'll explain with photos later :-)
 
Hmmm new plan, the gasket isn't actually wide enough either so there is a nice new-moon shaped gap up each edge letting in a load of light (77mm adapter ring)
So either it's going back, or I might add more gasket to the back which should resolve it. ( thankfully I have a ready supply of self adhesive foam!)
 
I have this filter too and what u got there Is light leakage , I solved it by making sure the filter was lined up perfectly in the holder or depending on where the light was falling in the scene resting a biz card on the top of the filter and holder to shadow the top and block light . And so far this has solved all my problems even with exposures of 15-30min .
 
Yep I'm going to add more foam on the outside edges!

With a 77mm ring, the gasket is well visible to the lens, surely this is going to vignette?
 
Ok 10 reels of electric tape, some paper wedges and shutting the eye piece and I thought I would have resolved the light leak, but I've still got an awful red haze in the center of the image (have tinkered with WB).

I know these images are god awful but I just tramped to the nearest body of water to test this out

This is how much of a gap there was:
IMG_0431.JPG


This is an image with all the gaps covered:
WA3K8707.jpg


However, at 24mm there is an issue with the gasket getting in the way of the shot, this is how much of the gasket is showing (note you can also see how its leaking light in): *edit* looks like 100mm kit is the way to go, even for 24mm on FF!


IMG_0436.JPG


This is an image showing the issue:
WA3K8703.jpg
 
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If you have absolutely sealed the filter to the adapter/lens, and covered the viewfinder, then the only thing left is to put black tape around the edges of the filter to stop any light entering into the material that way.

A lens hood is normally a good idea but wouldn't do much in this situatuion when the brightest area is within the frame.
 
Hmmm I did tape everything earlier so there shouldn't be any stray light in there at all.

Can you get a hood to work with filter kits?
 
adamdavi3s said:
Hmmm I did tape everything earlier so there shouldn't be any stray light in there at all.

Can you get a hood to work with filter kits?
Click to expand...

Lee and Kood make bellows hoods for square filter systems, with integral filter slots.
 
adamdavi3s said:
Hmmm I did tape everything earlier so there shouldn't be any stray light in there at all.

Can you get a hood to work with filter kits?
Click to expand...

HoppyUK said:
Lee and Kood make bellows hoods for square filter systems, with integral filter slots.
Click to expand...

:lol::lol::lol:

Glad you asked...as soon as I read Richard's post I looked at my square filter system and went :thinking:

I was gonig to ask but got distracted...

Cheers.
 
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Ahah, Adam... maybe you do need the 100mm filter... as i mentioned earlier i have the Super Wide Angle Lee Ring for my Sigma 10-20 (crop sensor) as it would vignette otherwise. Maybe the Cokin is the problem.... I have the Lee Foundation Kit and 100mm Hitech which i bought when i got the 10-20 as i also had the full set of Hitech 85mm Filters with my 18-70 Kit lens.

HAve you just bought the Cokin P aswell? Even with the Lee Kit the standard 77mm Ring Vignettes on my friends 17-40 on his 5d Mk2. I know youre using a 24mm lens but the reason for the wider ring is due to the throw on the filter holders.
Heres what happened the first time i didnt cover the viewfinder :[

DSC_1108.jpg
 
Hmmm I think I'll invest in a 100mm kit, but I still don't like the red haze on the other photo (@28mm I think)

I'm very surprised at the poor fit of the gasket to be honest!!
 
Lee is the way to go. Using the WA ring there is no vignetting even at 16mm on full frame with Nikon 16-35mm. It does seem however that the whole process is littered with pitfalls and requires flawless attention to detail and practice. The easy bit is deciding to go for Lee, the hard bit is coming to terms with the cost and the real killer is then having to accept that you'll have to wait months for supply of stock. By Lee buy once.
 
Yeah I'll get a lee kit to avoid the vignetting but I am not spending the best part of £200 on a big stopper, this is only a hobby to me!

So, how do I correct the red cast in the image?
Or do we think the lee holder with the hitech 100mm might do the trick?
 
Fair points, don't know about the way a Hitech filter would seal in the Lee holder. The Lee BS has a foam gasket attached to the edge of the filter, does the Hitech? Colour casts seem to plague most 10x filters, my Lee is blue (!). The solution is to shoot RAW and then adjust colour cast in processing, it works for me.
 
Hi,

Yeah the lee specific hitec has a gasket, 1.5mm rather than this 3mm one.

This casts blue also, but the red haze only appears to be causing an issue central to the images, the blue cast is very easy to clear up in pp but I can't get the haze out :-/
 
adamdavi3s said:
Hmmm I think I'll invest in a 100mm kit, but I still don't like the red haze on the other photo (@28mm I think)

I'm very surprised at the poor fit of the gasket to be honest!!
Click to expand...

But the Filter is not really designed to go in a Cokin P Holder... its designed to go in Hitechs Holder or Lee's. I have to admit my filter is slightly curved so does have a small gap but ive never had these problems.

adamdavi3s said:
Yeah I'll get a lee kit to avoid the vignetting but I am not spending the best part of £200 on a big stopper, this is only a hobby to me!

So, how do I correct the red cast in the image?
Or do we think the lee holder with the hitech 100mm might do the trick?
Click to expand...

But you have a Canon 1DS..... why not spend a relativly small amount of money on the equipment that is right for your camera? The 85mm is too small imo. The hitech is fine, you dont have to buy the Big Stopper :)

Heres 2 shots of the same scene, 1 with the Lee Big Stopper and 1 with the Hitech... both sooc. They both have a cast as do all filters. Use the WB Dropper in ACR or set a custom WB in camera :)

Lee 67 by gizto29, on Flickr


Hitech 65 by gizto29, on Flickr
 
I only went with the Cokin P as I wasn't sure how much I would use the filters, having shot mostly cycling & point-to-points in the past I didn't know if I would take to landscape or not :)

Those shots almost make it a no brainer! How do you clear that redish cast in the center then? I tried all sorts in PP and couldn't get a decent image!
 
adamdavi3s said:
I only went with the Cokin P as I wasn't sure how much I would use the filters, having shot mostly cycling & point-to-points in the past I didn't know if I would take to landscape or not :)

Those shots almost make it a no brainer! How do you clear that redish cast in the center then? I tried all sorts in PP and couldn't get a decent image!
Click to expand...

Fairly confident guess, it's infrared interference. So you probably can't get rid of it.

Try this test. Shoot into the light, including sunny sky, as you have done. You'll get the red patch. Then point the camera down to cut out the sky (and most of the IR) and the patch will probably go.

Be interested to see how you get on.
 
Philip is yours the older Hitech?

I know that they had an issue with IR on the old ones but I thought it was resolved here...

I've sold my 85mm version but am just looking for a little clarity before dropping the ££ on the 100mm... or I might have to save for a few months more and get the lee :-D
 
adamdavi3s said:
Philip is yours the older Hitech?

I know that they had an issue with IR on the old ones but I thought it was resolved here...

I've sold my 85mm version but am just looking for a little clarity before dropping the ££ on the 100mm... or I might have to save for a few months more and get the lee :-D
Click to expand...

There's a review of all the best extreme ND filters coming up in Advanced Photographer magazine. Issue after next, so not for a few weeks yet though.
 
adamdavi3s said:
I only went with the Cokin P as I wasn't sure how much I would use the filters, having shot mostly cycling & point-to-points in the past I didn't know if I would take to landscape or not :)

Those shots almost make it a no brainer! How do you clear that redish cast in the center then? I tried all sorts in PP and couldn't get a decent image!
Click to expand...

Thats a fair point Adam, one thing worth considering in that situation wouldve been a piece of £1 Welding Glass which is between 9 & 14 stops depending on the shade. You get a green cast but this can be removed in Adobe Camera Raw or by setting a custom WB. Theres a huge thread on here showing shots and discussing everything about them.
http://www.talkphotography.co.uk/forums/showthread.php?t=152480&highlight=welding+glass

adamdavi3s said:
Philip is yours the older Hitech?

I know that they had an issue with IR on the old ones but I thought it was resolved here...

I've sold my 85mm version but am just looking for a little clarity before dropping the ££ on the 100mm... or I might have to save for a few months more and get the lee :-D
Click to expand...

Mine is the newer Pro Stop and the older one is terrid!

Heres some info regarding the Old one v Lee...
http://blog.robertstrachan.com/archives/844/lee-big-stopper-hitech-10-stop-nd-filter-review/

New Hitech Pro 10 Stop v Lee Big Stopper
http://blog.robertstrachan.com/archives/1314/hitech-pro-stop-review/

How to remove the cast on Hitech/Lee etc
http://blog.robertstrachan.com/arch...e-lee-big-stopper-or-hitech-pro-stop-filters/

I have to say Adam ive never had this problem.... its hard to see properly but were you shooting into the sun? Those 2 shots i added were straight out of camera, no processing. It was a little test as my friend has the Big Stopper. The only difference is when i went to shut the shutter with my ir remote it didnt work first time so the Lee was 2 seconds longer. I do feel the image is sharper in the rock areas but given the price difference and the fact you cannot get Lee Big Stoppers anywhere its fine. I also have a Heliopan ND3.0 which is brilliant with barely no cast but its a screw in jobby so i cant use grads :( Im surprised Heliopan and B&W dont make a slot filter...

HoppyUK said:
There's a review of all the best extreme ND filters coming up in Advanced Photographer magazine. Issue after next, so not for a few weeks yet though.
Click to expand...
Look forward to that. :)
 
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I have to be honest, watching the second hand prices I though the lee stoppers were like £200 new... I can't believe they were only £90-£100.... :gasp:

I think I'll go for a hitech to cover me until the summer when the stoppers are plentiful again!

Thank you for all the advice everyone!
 
Sigh, well that's a whole lot of mulah spent!!
£100 for the foundation kit & 77mm WA
£70 for the filter

ouchie!
 
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