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Messages - bluesphoto

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1
Lenses / Re: What's wrong with cheap ND filters?
« on: August 15, 2013, 03:37:22 PM »

1.  That it is truly neutral.  A ND filter that is not neutral will mess up your image


Well that is not exactly true. Every Nd filters has some kind of colour cast, some allot others a bit but of course it isn't that obvious if you only look at one exposure but if you look at two with and without you will notice it. The first one that is truly neutral would put every other filter company out of business.
But in the end you will want one with the least colour cast as possible or with the one that you think looks good(warm or cold colours).

2
Lenses / Re: What's wrong with cheap ND filters?
« on: August 15, 2013, 03:29:44 PM »
That was an awesome article on ND filters.

Yeah I know I learned almost everything on nd's from that site. It took me a while before I found it thou, so I thought that it would be useful here.

3
Lenses / Re: What's wrong with cheap ND filters?
« on: August 15, 2013, 10:55:41 AM »
thanks for the great replies

what's 10 stop?
does that mean it goes from 1, 2, 3... 10 grades of grey?

Well omar 10stop is the amount of stops of light the filter blocks. A stop less light is equal to half the amount of light captured buy the sensor. For example if you have your settings at 1/200, f/8 and iso 200. Then to half the light you can either half the shutter speed too 1/100 or half the aperture size which means changing it too f5.6 or you can half the iso sensitivity too 100.
Now if you want a really long exposure you use for example a 10 stop and you can increase your shutter time by 2^10 or 1024. So the you have a time of +-5seconds.

most of the time the manufacturers use stops which can be used as 2^x or they use 1000x wich is about the same as 2^10=1024.

BUT I really think you should read the article first it will answer almost every question.

4
Lenses / Re: What's wrong with cheap ND filters?
« on: August 15, 2013, 10:36:22 AM »
ok. i am convinced to invest

lee filters are square??
do i need to buy a separate holder?
will this holder work with all lens sizes?

what are the options for me to buy - looking for brand names

i have:

- hoya
- lee filters
- Marumi - no good availability in UK

anything else to consider?

ALSO: what do i need? n2, n4... n400??
what should i start with?

thanks


Hi omar,

I suggest you start with reading this :http://www.redbubble.com/people/peterh111/journal/4421304-the-ultimate-guide-to-neutral-density-filters
I found it to be very useful to learn about nd filters and which to buy.

A brand I would highly recommend is B+W I have their 10 stop and 6 stop filter because I like the really long exposures(a few minutes long on a bright summers day ;) ).
That would be my go to for screw in filters.
If you also want to buy gradual nd's later, I think it is best to invest in a LEE set. But the waiting period for the 10 stop is easily a few months.

I hope this was useful to you.

5
Lenses / Re: How to reduce the nd filter warm color cast?
« on: February 13, 2013, 09:36:34 AM »

Thanks a lot for the advice! I ordered the Heliopan filter today and am very eager to see the results, and I admit I hope that wb will fix it most of the time because with Photoshop I end up with a 100mb tif instead of a 20mb dng :-o

Wb can fix it but I personally alway fix it in ps because then you can work in layers because sometimes the colour cast is higher(more noticeable) in certain regions than in others so then you have to use masks.
And there is also the fact that white-balance only checks if the whites are white it doesn't necessary mean that the other colours are good after correcting wb.
Which most of the time they aren't(if you stack) because the nd's give a stronger colour cast.

6
Lenses / Re: How to reduce the nd filter warm color cast?
« on: February 12, 2013, 08:11:23 AM »
You can fix it with the white balance.
Or you can do it in photoshop with a method that can remove every colour cast ( doesn't always work well because it is based on the average of the image).
this is the one I use:
Photoshop Quick Colour Cast Removal Technique Small | Large

And here are some alternatives: http://www.udel.edu/cookbook/class/Tricks/color-cast.pdf and http://www.photoshopessentials.com/photo-editing/photo-filter/

7
thats really cool you warned me about that one, i will pass on it then,.......just kidding of course,

Based on what i read and see on this unit it appears to be the best all around unit, none of these hand held units seem user friendly though, i think i want both the  Giga T and the triggortrap ios app and cable to learn how to set up star trails and other cool things faster, this way when i am going to do longer shoots ill be familiar with some of the techniques some of you mention on this site.

And Seriously,  thanks


No problem at all.
It isn't that difficult learning to know it or the techniques.

Here you have some sites for time laps techniques:http://content.photojojo.com/tutorials/ultimate-guide-to-time-lapse-photography/ and http://www.learnmyshot.com/17+Steps+to+Create+Time+Lapse+Video+from+Still+Images.

Be sure to watch the video at the bottom of the last site, I personally think it is one of the best time laps videos I have seen and it might inspire you.

For star-trails you can find a cheap and easy too use program here: http://www.startrails.de/.
But of course PS is better but you have too do all the blending.
This might be an interesting site for the technique:http://www.jamesvernacotola.com/Resources/How-To-Photograph-Star-Trails/12233655_V7cX4D.

8
That is exactly the one I have.
Yes it works as a remote too, as a normal trigger or in bulb mode. Every function works remote or with the cable.

Just one little problem I have noticed is the on button for the receiver is easily activated. witch isn't good if it does that in your bag because the battery will loose all it's power. That is why i always take the battery out of the receiver because it is a bit tight in by bag. the transmitter doesn't have that problem because it shuts down after a while.

9
I also use the hähnel Giga T Pro II, you can use it as a timer and intervalometer and wired or wireless.
As intervallometer you can progam a program for lets say 10 shots per minute and then embed this progam in a 2nd progam so it repeats progam 1 every 5 min.
I think this makes it perfect for time lapses.
It is expensive but it can do every thing you would want.

http://www.bhphotovideo.com/c/product/852088-REG/hahnel_HL_HWGIGA_C_Giga_T_Pro_II.html


This seems like a huge advantage over regular intervalometers. I struggle to imagine what it would look like though. Can you show me the effect his double loop has in time lapse videos?


I haven't used the double loop it yet.

but it could be very useful if you want to make a time laps video of 1 place of a whole day but lets say you want too get a sequence of x frames during y min shot in the morning, x frames a few hours later and so on.
Then you get a video of x/24 min morning + x/24 min midday + x/24 min afternoon + x/24 min evening.

Or if you want to capture an action time laps, for example of cars driving on a circuit, you know they pass every 5 min and they pass in 5 sec then you can program for example 8 frames per sec during 5 sec and repeat it every 5 min.

Or if you want to have startrails that are like a dotted lines(- - - - -) if you know what I mean.

10
I also use the hähnel Giga T Pro II, you can use it as a timer and intervalometer and wired or wireless.
As intervallometer you can progam a program for lets say 10 shots per minute and then embed this progam in a 2nd progam so it repeats progam 1 every 5 min.
I think this makes it perfect for time lapses.
It is expensive but it can do every thing you would want.

http://www.bhphotovideo.com/c/product/852088-REG/hahnel_HL_HWGIGA_C_Giga_T_Pro_II.html

11
Landscape / Re: Post Your Best Landscapes
« on: January 26, 2013, 05:31:11 PM »
This is a pano that I made in Landmannalaugar in Iceland. (It is a pano made from 57 photo's in 3 lines of 19.)

(Please watch it full size because otherwise the details will go lost)

I find this a fascinating photo for several reasons.  First the technical acomplishment of 57 photos all in one.  Second is the vastness and barely touched eathscape.  Third the single lone vehicle and small road that humans have been here (could have been some other planet).  Fouth is that I've never seen what appears to be small volcanoes.  Are they?  And finally thank you for showing us a place on earth that I will never see myself.  Thank you  .

You're welcome. I hope you can see it someday, because you can't really catch the vastness and depth with a picture.
It did take an hour I guess to merge them together and an additional hour of PS.
I don't think it was a volcano, thou I'm not sure.

12
Landscape / Re: Post Your Best Landscapes
« on: January 24, 2013, 01:00:51 PM »
This is a pano that I made in Landmannalaugar in Iceland. (It is a pano made from 57 photo's in 3 lines of 19.)

(Please watch it full size because otherwise the details will go lost)

13
Lenses / Re: What nd filter density (combinations) do you use?
« on: January 24, 2013, 10:57:23 AM »
Q1) A 10 stop would be the best. stacking a 3+6 isn't as good as a  10 stop because you loose a bit of sharpnes and the (red in case of b+w, blue in case of lee)colorcast gets worse. not as much with lee as with b+w i have read.(don't own lee yet).

Q2)if you stack a pola and an nd make sure that the nd is closest to your lens. this s something b+w and lee both advertise, it has something to do with reflections and polarisation of the light and the way the whole light spectum passes the filter. same if you stack multiple nd's alway the strongest closesed to the lens

Q3) it doesn't have a big impact on the sharpness or contrast of the photo.

btw even a 6 and 10 stop combo isn't an overkill if you want to achieve long exposures(1-2 min) during the day.
this is handy for blurring slow cloud movement or a lot of traffic.

14
Reviews / dpreview 6d test data
« on: January 17, 2013, 05:34:24 PM »
Dpreview has released it's test data for the 6d:
http://www.dpreview.com/news/2013/01/17/Just-posted-extended-preview-with-full-test-data-and-analysis

I tought this might be interresting.

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