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Thread started 01 Apr 2011 (Friday) 13:58
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Anyone used these variable ND filters

 
neil_r
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Apr 01, 2011 13:58 |  #1

7Day Shop in the UK are offering these variable ND filters at what looks like give away prices, anyone seen / used these?

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http://www.7dayshop.co​m …=777_1&products​_id=111257 (external link)


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tommayor
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Apr 06, 2011 07:01 |  #2

Hi,

This is my first post after a few days of browsing the amazingly helpful forums!

i saw these the other day an would also like to know if anyone has had any luck with them? i used 7dayshop for a couple of lens hoods! they do the job and fit perfectly.

Tom


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MCAsan
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Apr 06, 2011 07:17 as a reply to  @ tommayor's post |  #3

If they so inexpensive, purchase one and give the rest of us a report. I know I have been very happy with my Fader which is much less expensive that the Sighray VND.




  
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hollis_f
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Apr 07, 2011 05:25 |  #4

I've got a 7-Day Shop VND on order. Then I saw these Polaroid ones (external link) were cheaper, So I've ordered one of them as well. One will be getting returned.


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ender78
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Apr 07, 2011 05:56 |  #5

I'm worried about anything that Polaroid put its name on. They sold out the brand to the highest bidder.




  
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TaDa
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Apr 07, 2011 06:12 |  #6

Well, for that price, I don't think it matters what the name on the filter is. You sort of know what you're getting at that price point


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big_g
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Apr 08, 2011 16:18 as a reply to  @ TaDa's post |  #7

OP. You have got a really nice collection of equipment, why would you spend all that money on L series glass and then put the cheapest ND filter you can find on the front of it?

Really good quality NDs are not stupid money and you can still realise the quality of the rest of your equipment.

Bit like putting cheap tyres on a Ferrari


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neil_r
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Apr 09, 2011 04:31 |  #8

big_g wrote in post #12184948 (external link)
OP. You have got a really nice collection of equipment, why would you spend all that money on L series glass and then put the cheapest ND filter you can find on the front of it?

Really good quality NDs are not stupid money and you can still realise the quality of the rest of your equipment.

Bit like putting cheap tyres on a Ferrari

I have a full set of Lee ND's. I am not thinking of buying one I was simply asking if anyone was using one and what was the quality like. I find it hard to believe that something so cheap could be good quality, but it would be good to know if they were any good.


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hollis_f
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Apr 09, 2011 05:27 |  #9

OK, it's arrived. But I don't think it'll be staying long. First reason is the build-quality, it's all plastic. The thread feel as if they may last a few dozen fittings. Then there's the performance.

With the 10-22 there's bad vignetting at 10mm. The cross-pattern appears at around 3 stops @ 10mm and 5 stops @ 22mm - which is, I understand not too bad.

I've heard there's problems with IQ using VNDs on long lenses, so I stuck it on my 100-400 @ 400mm. Yeeeuch! Horrible! I used my tripod and took some shots using manual exposure (f8 2s) using the VND and my Heliopan 10-stop ND. The difference in IQ was incredible. Here's 100% crops, you can guess which is which.

IMAGE: http://www.frankhollis.com/temp/VND%20Test.jpg


So it's a VND that's not usable on long lenses because of the drop-off in IQ, that's not usable on short lenses because of the cross-pattern and feels like it won't be usable on anything for very long before the threads are worn out.

I shall be returning it as 'not fit for purpose' for a full refund.

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argyle
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Apr 09, 2011 06:10 |  #10

hollis_f wrote in post #12188324 (external link)
OK, it's arrived. But I don't think it'll be staying long. First reason is the build-quality, it's all plastic. The thread feel as if they may last a few dozen fittings. Then there's the performance.

With the 10-22 there's bad vignetting at 10mm. The cross-pattern appears at around 3 stops @ 10mm and 5 stops @ 22mm - which is, I understand not too bad.

I've heard there's problems with IQ using VNDs on long lenses, so I stuck it on my 100-400 @ 400mm. Yeeeuch! Horrible! I used my tripod and took some shots using manual exposure (f8 2s) using the VND and my Heliopan 10-stop ND. The difference in IQ was incredible. Here's 100% crops, you can guess which is which.

QUOTED IMAGE


So it's a VND that's not usable on long lenses because of the drop-off in IQ, that's not usable on short lenses because of the cross-pattern and feels like it won't be usable on anything for very long before the threads are worn out.

I shall be returning it as 'not fit for purpose' for a full refund.

Generally, the cross pattern should only appear at very wide focal lengths while at or beyond the max density of the filter. If its an 8-stop max filter, and you're getting the cross pattern at only 5-stops, then by all means get rid of it. Not surprised about the construction/performan​ce at that price, either.

After some consideration (and seeing the results from the first Fader testing), I decided many months ago to bite the bullet and go with the Singh-Ray Vari-N-Duo (variable plus polarizer). Its much more expensive, but the quality, workmanship, and IQ is well worth the cost difference. The cross pattern still appears, but only when I go beyond the max density of the filter (while also at wide focal lengths), but is completely gone at 35mm on a FF body.

TBH, I have never tried it on my 100-400...that lens is known to be a bit squirrelly when using any type of filter, but you do have me curious. Maybe I'll give it a shot and see what happens.


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TaDa
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Apr 09, 2011 07:23 |  #11

Wow. Might as well just paint a pringles cap a dark color and it looks like you'd get better results.


Name is Peter and here is my gear:
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Glass - Zeiss 21 f/2.8 ZE, Canon 35 f/1.4L, Canon 40 f/2.8 STM, Canon 24-70 f/2.8
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rick_reno
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Apr 09, 2011 10:19 |  #12

TaDa wrote in post #12188560 (external link)
Wow. Might as well just paint a pringles cap a dark color and it looks like you'd get better results.

That is very, very good! bw!




  
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John ­ Hudson
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Apr 11, 2011 05:37 |  #13

Hollis, is your review (post #9) of the polaroid or the 7day shop filter?

You have both ordered, but your review does not state which filter is being tested.

Cheers

John.




  
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hollis_f
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Apr 11, 2011 06:06 |  #14

John Hudson wrote in post #12198806 (external link)
Hollis, is your review (post #9) of the polaroid or the 7day shop filter?

You have both ordered, but your review does not state which filter is being tested.

Cheers

John.

Whoops! It's the 7DayShop one. The Polaroid hasn't arrived yet.


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anthony11
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Apr 16, 2011 22:07 |  #15

hollis_f wrote in post #12188324 (external link)
With the 10-22 there's bad vignetting at 10mm. The cross-pattern appears at around 3 stops @ 10mm and 5 stops @ 22mm - which is, I understand not too bad.

Cross-pattern?


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Anyone used these variable ND filters
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