Gradient Universal Filter - 'DIC', DF, OL effects

Mitch640 · Post by **Mitch640** » Thu Nov 17, 2011 4:48 am

Ah, OK, thanks. I missed that cause I was looking at the great images.

Charles Krebs · Post by **Charles Krebs** » Thu Nov 17, 2011 9:52 pm

Litonotus,

It works beautifully! Thanks for giving us a look at both the images and your custom filter.

Jacek · Post by **Jacek** » Fri Nov 18, 2011 6:30 am

These are my photos taken through the filter Litonotus friend

Jan l'Amie · Post by **Jan l'Amie** » Fri Nov 18, 2011 7:16 am

I just made your universal filter.
The first photo I made with my moonshaped blue stop filter.
The second is made with your filter.
This is just a quick one, I'm sure it can be much better.
Your filter works great. Thanks

Greetings
Jan

Litonotus · Post by **Litonotus** » Fri Nov 18, 2011 8:09 am

thank you all (:

looks good (: grey background is great for observations, blue just looks better, and is sharper here (I think it is not because the filter). lucky you, I haven't seen the micrasterias yet /:

Jacek - great (:

Jan l'Amie · Post by **Jan l'Amie** » Fri Nov 18, 2011 9:52 am

Lots of Micrasterias thomasiana, rotata, crux-melitensis and truncata in a pond about 15 km from my house.

Litonotus · Post by **Litonotus** » Fri Nov 18, 2011 11:47 am

Jan l'Amie wrote:Lots of Micrasterias thomasiana, rotata, crux-melitensis and truncata in a pond about 15 km from my house.

and about 1500 km from mine

Pau · Post by **Pau** » Fri Nov 18, 2011 12:22 pm

Jacek wrote:These are my photos taken through the filter Litonotus friend
...

Excellent. At the posted size I don't see any disadvantage respect true DIC (altough I'm a DIC beginner)

If there was in the forum any kind of award for "the best DIY device" it must be for Litonotus

Litonotus · Post by **Litonotus** » Fri Nov 18, 2011 1:06 pm

thank you, Pau; but I think the best award for me is satisfaction that I invented something new (:

one image of a larva, taken using the blue filter

and a copepod (grey filter)

RogelioMoreno · Post by **RogelioMoreno** » Fri Nov 18, 2011 1:53 pm

Litonotus,

Excellent!

Are you buying your Nikon DIC setup to complement it? It looks like you do not need DIC.

Rogelio

Litonotus · Post by **Litonotus** » Fri Nov 18, 2011 11:18 pm

thank you (:

I'm trying to complete it, and someday it would be perfect to compare results. It is hard to imagine that this filter could be better than Nikon system... who knows?

My filter works great on lower magnifications, and when the specimen is big, for ex. water fleas, copepods, larvaes, big algaes etc. You can't get the same effect on 40x objective and higher /:

Jan l'Amie · Post by **Jan l'Amie** » Sat Nov 19, 2011 12:49 am

Great pictures.
I read somewhere that this not will work if the NA factor of your objective is higher than 0.65
This filter works great and I think it is a little cheaper than the Nikon stuff.

Litonotus · Post by **Litonotus** » Sat Nov 19, 2011 3:40 am

Jan l'Amie wrote: I read somewhere that this not will work if the NA factor of your objective is higher than 0.65

it works but gives only 'traditional' obligue light, it works better on 100/1,25 than on 40/0,65. filters worked great on a nikon 40/0,55 LWD objective.

I will post an image taken on a 100x objective.

Jan l'Amie wrote:This filter works great and I think it is a little cheaper than the Nikon stuff.

yes, only a little

Litonotus · Post by **Litonotus** » Sat Nov 19, 2011 12:39 pm

As I said I'm posting two images from high magnifications.

here is a very old image (meridion circulare), I do not remember filter I used, but it was before I invented my universal gradient filter. it is quite good anyway and confirms that assumption with high NA. that nikon LWD objective had NA 0,55, I regret that I sold it but I had to save for other microscope items I'm collecting.

pediastrum boryanum - universal filter on 100/1,25 - this is the best I can get, with PS postediting of course. it gives only obligue light here.

Jacek · Post by **Jacek** » Thu Nov 24, 2011 3:55 pm

Difflugia sp filter Litonotus

http://www.youtube.com/watch?v=0tlvWcEcyDs