ND (Page 2): I believe when you take your ND filter outside and use it properly, it will work just fine. Like mine does.

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Jul 2, 2022 05:36:06 #

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

winhto wrote:

This was to test my new ND filter to see if it could be used for waterfalls. The result was this nasty crossed lines.

Could anyone tell me why this?

Thanks

I believe when you take your ND filter outside and use it properly, it will work just fine. Like mine does.

Jul 2, 2022 07:31:15 #

f8lee Loc: New Mexico

winhto wrote:

This was to test my new ND filter to see if it could be used for waterfalls. The result was this nasty crossed lines.

Could anyone tell me why this?

Thanks

When I switched from Nikon to Fuji some years back, I discovered the same effect happened with the Singh-Ray variable ND filter I had used without issue for years. I contacted Singh-Ray, and they said that this effect (which they called the "Maltese Cross") was something that happened on some digital cameras while not on others. Apparently it has to do with the destructive interference of the two CPLs and the physical separation of the photo sites on the imaging chip - in other words, it might happen with one 24MP camera and yet not with another 24MP camera that uses a different chip.

As I experimented with it I found it also seemed to depend on the focal length of the lens being used, and the aperture to some degree.

The point is, since it obviously happened with your setup (at least the one you show here) you will likely need to use standard ND filters going forward.

Jul 2, 2022 07:34:25 #

deanfl Loc: Georgia

winhto wrote:

This was to test my new ND filter to see if it could be used for waterfalls. The result was this nasty crossed lines.

Could anyone tell me why this?

Thanks

As has been mentioned most variable ND filters will produce an X if turned to the maximum setting. To get rid of the X simply keep turning the dial toward the minimum setting. At the point the X disappears you will know where to set your filter. I have a cheap variable ND filter that I don’t use that often. The above technique should work for your filter.

Jul 2, 2022 07:59:00 #

winhto Loc: Edmonds, Washington

Thanks Dean for that useful information. I'll remember that.

Jul 2, 2022 08:04:58 #

CaptainPhoto

Architect1776 wrote:

Because you need to learn how to use the filter.
When improperly used this will happen.
Good filters have markings etc on where to turn for minimum to maximum.
Failure to follow equipment instructions, as in everything , creates a failure.

Now this is what I call a really helpful reply

Jul 2, 2022 08:10:22 #

deanfl Loc: Georgia

winhto wrote:

Thanks Dean for that useful information. I'll remember that.

I just edited my post. I should have referred to a variable ND filter which it sounds like you have.

Jul 2, 2022 08:12:07 #

CaptainPhoto

Check out this ad in B&H Photo on K&F Variable ND Filters

https://www.bhphotovideo.com/c/product/1707401-REG/k_f_concept_kf01_1852_72mm_nano_x_pro_magnetic.html

It could be just the brand of ND filter you have. The good one's don't produce the "X" .

You didn't say what brand or if the one you used was a Variable or Fixed ND filter. The dark lines can also show up if you are using a wide-angle lens. The "Thin" version of an ND filter on a Wide-Angle lens is better.

Jul 2, 2022 08:18:45 #

f8lee Loc: New Mexico

CaptainPhoto wrote:

Check out this ad in B&H Photo on K&F Vari... (show quote)

This is not necessarily true - Singh-Ray is certainly a "good" brand (look it up) and gave me the issue on the Fuji X-T cameras where it did not on the Nikon DSLRs. It likely has to do with the particular polarizing foils used by the manufacturer in conjunction with the photo site spacing on the camera's imaging chip.

Jul 2, 2022 10:40:49 #

rmalarz Loc: Tempe, Arizona

I highly suspect that this is a VND and not an ND. VND filters have this characteristic.
--Bob

winhto wrote:

This was to test my new ND filter to see if it could be used for waterfalls. The result was this nasty crossed lines.

Could anyone tell me why this?

Thanks

Jul 2, 2022 11:13:03 #

jerryc41 Loc: Catskill Mts of NY

Yes, this is a characteristic of variable ND filters.

https://urth.co/magazine/faq-items/im-getting-x-pattern-variable-nd2-400-filter-fix
https://www.digitalcameraworld.com/buying-guides/best-variable-nd-filters
https://www.youtube.com/watch?v=pK0BR8g7DHM
https://www.dpreview.com/news/8909959108/nisi-launches-variable-nd-filter-with-the-dreaded-x-effect
https://camerajabber.com/best-variable-nd-filter/

Jul 2, 2022 11:34:33 #

winhto Loc: Edmonds, Washington

Yes Captain photo, that's what I have.

Jul 2, 2022 11:37:50 #

winhto Loc: Edmonds, Washington

Thanks Jerry for the link.

Jul 2, 2022 11:57:43 #

winhto Loc: Edmonds, Washington

Thanks all, very informative.

Jul 2, 2022 15:00:14 #

SuperflyTNT Loc: Manassas VA

winhto wrote:

So Alpha, are you suggesting that I use 2 LP in order to avoid this from happening again? Or should I use a fixed ND, is so, should an ND8 be good enough for a setting at f1.8 for smoothness?

I’m kinda confused. Why would you want to shoot waterfalls at f/1.8? That seems to be way too narrow DOF. Generally the reason you’re using an ND filter is to maximize the shutter speed. Obviously the smaller the aperture the longer the speed. As to whether an ND8 is enough really depends on exactly how long you want the shot and how much light there is.
If you are using a VND another reason you want one that’s well marked is so you know what value to use when calculating shutter speed.

Jul 2, 2022 15:25:59 #

John O.

It is not the brand of VDN filter. You need to make sure that you do not rotate the outer ring beyond the markings or the cross will appear. Remember that the filter will rotate 360 degrees but you can only use it between the markings on the outer ring. I had to learn the hard way and buy two filters.

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