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Victor Wolansky · 11-04-2014, 10:46 AM

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Originally posted by itshimitis

This is with the dörr filter: 57 secs at f/25 - it doesn't seem as dark as the Lee 10 stopper, but seems more in line with the normal 10 stopper according to apps

Hi! Where did you purchased that filter? Googling it gives me no useful results.

Thanks!

itshimitis · 11-04-2014, 01:19 PM

Originally posted by Victor Wolansky

Hi! Where did you purchased that filter? Googling it gives me no useful results.

Thanks!

I got it from Amazon UK

GarethC7 · 11-04-2014, 02:02 PM

Originally posted by itshimitis

This is with the dörr filter: 57 secs at f/25 - it doesn't seem as dark as the Lee 10 stopper, but seems more in line with the normal 10 stopper according to apps

If Lee is consistent in their manufacturing then from what I can work out with my Big Stopper it's closer to 10 2/3 stops so that makes sense.

itshimitis · 11-04-2014, 04:53 PM

Originally posted by GarethC7

If Lee is consistent in their manufacturing then from what I can work out with my Big Stopper it's closer to 10 2/3 stops so that makes sense.

I would say you are close as going by Longtime exposure calculator app for iPhone, I always end up underexposed.

Victor Wolansky · 11-04-2014, 11:07 PM

Originally posted by itshimitis

I got it from Amazon UK

Is this by any chance?

Dorr 40.5mm 1000x ND 3.0 Neutral Density Filter: Amazon.co.uk: Camera & Photo

itshimitis · 11-05-2014, 01:27 AM

Originally posted by Victor Wolansky

Is this by any chance?

Dorr 40.5mm 1000x ND 3.0 Neutral Density Filter: Amazon.co.uk: Camera & Photo

that would be the one, yes

Thomasbrowphoto · 04-01-2015, 04:10 PM

Originally posted by itshimitis

that would be the one, yes

I ordered this filter last night, Itshimitis were you happy with the IQ overall and are you able to stack these filters by adding another weaker ND screwed on?

**lmd91343** · 04-01-2015, 07:16 PM

I don't know how I stumbled on to this thread. However 40.5mm is a common size for 35mm RF lenses. I have a bunch of them for B&W and color. Several of my RF lenses are that size. Check the RF forums and web sites. Also I have bought some at the two big camera stores. For eBay and classified ads try searching for "Canon 40.5" or "Leica 40.5".

itshimitis · 04-01-2015, 07:26 PM

Originally posted by Thomasbrowphoto

I ordered this filter last night, Itshimitis were you happy with the IQ overall and are you able to stack these filters by adding another weaker ND screwed on?

They would need to be very thin indeed to fit on stacked. The Dörr filter is a good one though....

algrove · 04-03-2015, 10:35 AM

I got some B+W 40.5 ND filters at B&H. High quality Schott glass and all. Been using B+W filters on lenses for years.

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11-04-2014, 10:46 AM	#16
Victor Wolansky Inactive Account Join Date: Oct 2014 Posts: 91	Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. Originally posted by itshimitis This is with the dörr filter: 57 secs at f/25 - it doesn't seem as dark as the Lee 10 stopper, but seems more in line with the normal 10 stopper according to apps Hi! Where did you purchased that filter? Googling it gives me no useful results. Thanks!

11-04-2014, 01:19 PM	#17
itshimitis Pentaxian Join Date: May 2011 Location: All over the place Posts: 3,535	Originally posted by Victor Wolansky Hi! Where did you purchased that filter? Googling it gives me no useful results. Thanks! I got it from Amazon UK

11-04-2014, 02:02 PM	#18
GarethC7 Senior Member Join Date: Sep 2014 Posts: 139	Originally posted by itshimitis This is with the dörr filter: 57 secs at f/25 - it doesn't seem as dark as the Lee 10 stopper, but seems more in line with the normal 10 stopper according to apps If Lee is consistent in their manufacturing then from what I can work out with my Big Stopper it's closer to 10 2/3 stops so that makes sense.

11-04-2014, 04:53 PM	#19
itshimitis Pentaxian Join Date: May 2011 Location: All over the place Posts: 3,535	Originally posted by GarethC7 If Lee is consistent in their manufacturing then from what I can work out with my Big Stopper it's closer to 10 2/3 stops so that makes sense. I would say you are close as going by Longtime exposure calculator app for iPhone, I always end up underexposed.

11-04-2014, 11:07 PM	#20
Victor Wolansky Inactive Account Join Date: Oct 2014 Posts: 91	Originally posted by itshimitis I got it from Amazon UK Is this by any chance? Dorr 40.5mm 1000x ND 3.0 Neutral Density Filter: Amazon.co.uk: Camera & Photo

11-05-2014, 01:27 AM	#21
itshimitis Pentaxian Join Date: May 2011 Location: All over the place Posts: 3,535	Originally posted by Victor Wolansky Is this by any chance? Dorr 40.5mm 1000x ND 3.0 Neutral Density Filter: Amazon.co.uk: Camera & Photo that would be the one, yes

04-01-2015, 04:10 PM	#22
Thomasbrowphoto Veteran Member Join Date: May 2014 Location: NSW, Australia Posts: 335	Originally posted by itshimitis that would be the one, yes I ordered this filter last night, Itshimitis were you happy with the IQ overall and are you able to stack these filters by adding another weaker ND screwed on?

04-01-2015, 07:16 PM	#23
lmd91343 Site Supporter Join Date: Jul 2009 Location: Los Angeles, CA USA Photos: Gallery \| Albums Posts: 1,027	I don't know how I stumbled on to this thread. However 40.5mm is a common size for 35mm RF lenses. I have a bunch of them for B&W and color. Several of my RF lenses are that size. Check the RF forums and web sites. Also I have bought some at the two big camera stores. For eBay and classified ads try searching for "Canon 40.5" or "Leica 40.5".

04-01-2015, 07:26 PM	#24
itshimitis Pentaxian Join Date: May 2011 Location: All over the place Posts: 3,535	Originally posted by Thomasbrowphoto I ordered this filter last night, Itshimitis were you happy with the IQ overall and are you able to stack these filters by adding another weaker ND screwed on? They would need to be very thin indeed to fit on stacked. The Dörr filter is a good one though....

04-03-2015, 10:35 AM	#25
algrove Senior Member Join Date: Mar 2015 Posts: 160	I got some B+W 40.5 ND filters at B&H. High quality Schott glass and all. Been using B+W filters on lenses for years.

Source for 40.5mm filters for 25mm f4 DA lens

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