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badders
09-15-2011, 12:52 PM
We just received our first batch of Samyang 7.5mm lenses so here's a very quick couple of test panoramas for you:

http://www.360tacticalvr.com/showcase/samyang/7mm/reception/reception.htm
http://www.360tacticalvr.com/showcase/samyang/7mm/outside/outside.htm

Both examples shot with an Olympus E-P3 on a Nodal Ninja 3 Pano Head with the T-30 adaptor. I turned off Image Stabilisation and shot at f/11 for both examples. Focus was set to just a tad back from infinity. Stitching in PTGUI Pro 9.1 Beta2 and test web pages also made from PTGUI.

Shooting sequence was 4 around @ -15 degs plus 1 up @ 90 degs.

You can download the source files (which include the original images from camera, the stitched equirectangular and the PTGUI project files) here:

http://www.360tacticalvr.com/showcase/samyang/7mm/reception/source.zip (76.8 MB)
http://www.360tacticalvr.com/showcase/samyang/7mm/outside/source.zip (78.9 MB)

You can also see photos I took of the camera with both Black and Silver lenses mounted, along with shots of the E-P3 and lens mounted on the Nodal Ninja 3 used to make the panos here:

http://flic.kr/s/aHsjweGpLf

(Note: I just spotted something strange on the ceiling of the "reception" shot. Looks like PTGUI has done something odd with the tiles...)

Vincèn
09-15-2011, 11:14 PM
it looks to be pretty sharp in result :)

hindenhaag
09-15-2011, 11:33 PM
Thx for sharing Andrew.

This is a nice combination concerning size and weight. The lens is like a tennis ball. Will work great on top of the pole.

Settings seam to be LRS around 49 and URS 63 taken from your pics.

Heinz

badders
09-15-2011, 11:54 PM
I'll re-check the settings today and will publish for the NN3, NN4 and M1-S. I'm not sure yet what the optimum is for aperture and focus positions.

KG
09-16-2011, 12:10 AM
I did some testing on the Aperture settings before shooting my second test (http://www.360vr.nl/Amer), and found quite a difference in quality when changing Aperture.

Here is a sample, the only difference is 1/2 F stop.

At F 8 it looks like this (300% crop):

http://www.360vr.nl/Pics/F8.png

And at F 9.5 like this:

http://www.360vr.nl/Pics/F95.png

badders
09-16-2011, 12:14 AM
Very interesting. Over on the Panoguide forum Smooth is saying the lens should be set to f/5.6 or f/8 but looking at this and the other images I've seen from Hans it looks like a higher f stop is giving better results.

What distance away were those books?

DemonDuck
09-16-2011, 03:19 AM
badders RE: Reception

I don't see anything weird in the ceiling tiles.

What are those ghost reflections off the lights in the ceiling? Think it's from the translucent mirror?

badders
09-16-2011, 03:28 AM
I don't see anything weird in the ceiling tiles.
http://www.360tacticalvr.com/showcase/samyang/7mm/reception/tiles.png


What are those ghost reflections off the lights in the ceiling? Think it's from the translucent mirror?
I don't think the E-P3 has a translucent mirror. I think it's because this was shot @ f/11. I'm testing the lens today @ f/5.6, f/8 & f/11 to see which works best.

KG
09-16-2011, 04:32 AM
What distance away were those books?

Appr. 1.2 m / 4 ft


Karel

DemonDuck
09-16-2011, 11:09 AM
I don't think the E-P3 has a translucent mirror. I think it's because this was shot @ f/11. I'm testing the lens today @ f/5.6, f/8 & f/11 to see which works best.

I thought that was part of the ceiling. Oh right, this is Olympus. Sorry. Got a NEX fixation. Yeah, could be lens flare.

badders
09-16-2011, 11:40 AM
OK I think I've got this nailed now. Shooting @ f/5.6 seems to give the best results. I've tweaked the position on the NN3 so here's the settings for an Olympus Pen E-P3 with the Samyang 7.5mm on a NN3 using the T-30 Mount (reversed):

LRS: 46
URS: 63

Here's something for a bit of fun - shot in JPEG using the ART Filter - Dramatic:

http://www.360tacticalvr.com/showcase/samyang/7mm/outside/outside_art.html

I'm getting great stitch results with 4 shots around @ -15 degs plus 1 x zenith @ 90 degs.

badders
09-17-2011, 02:08 AM
Here's another sample. i couldn't position the camera at the same place indoors as the reception area was closed and the lights were off. So this is near the entrance and I shot 5 x bracket exposures @ 1ev and ran them all through PTGUI:

http://www.360tacticalvr.com/showcase/samyang/7mm/entrance/entrance.html

mgsati
09-24-2011, 01:04 AM
Advice needed. I tried shooting 4 shots around at both 0º and -15º along with. zenith and nadir shots. Although the lens can cover for a full spheric panorama, I'm unable to get the nadir shot to patch up the tripod. If I masked out the tripod in the nadir shot, I get missing pieces. On top of that, I have a nadir adapter and appears in all the four round shots. Well, still a newbie to all these.

I have to get a better ballhead with strong clamp. My GH1, the NN3 kit with nadir adapter with two quick release systems should be under 4kg (max weight my ball head supported), but it keeps sliding off the level. And when I use the nadir adpater, my whole setup will slip down. Arghh!!!

badders
09-24-2011, 01:35 AM
If I masked out the tripod in the nadir shot, I get missing pieces.
Are you taking 2 x Nadir shots? i.e. One straight down over the tripod then a second with the nadir adaptor rotated and the tripod moved to one side? There's a full tutorial in a thread on this forum on how to shoot the nadir using the nadir adaptor.


On top of that, I have a nadir adapter and appears in all the four round shots.
You MUST have the unit setup incorrectly. Can you post a photo of how you have your unit setup?


I have to get a better ballhead with strong clamp. My GH1, the NN3 kit with nadir adapter with two quick release systems should be under 4kg (max weight my ball head supported), but it keeps sliding off the level. And when I use the nadir adpater, my whole setup will slip down. Arghh!!!
Why are you using the ballhead? Take it off and mount the NN3 directly to the top od the tripod. If you need to level the NN3, simply adjust the tripod leg heights.

hindenhaag
09-24-2011, 02:21 AM
When you get "black spaces", you did not move the tripod far enough to get free space between Nadir1 and Nadir2. You have to use the special set as seen in the pic. If you can not realize this with NN3 and your LRS = lower rail setting, move the third leg to center of tripod by shortening the legs length.

336335339341343340344©2011hindenhaag

Heinz

mgsati
09-24-2011, 02:40 AM
Are you taking 2 x Nadir shots? i.e. One straight down over the tripod then a second with the nadir adaptor rotated and the tripod moved to one side? There's a full tutorial in a thread on this forum on how to shoot the nadir using the nadir adaptor.

You MUST have the unit setup incorrectly. Can you post a photo of how you have your unit setup?

Why are you using the ballhead? Take it off and mount the NN3 directly to the top od the tripod. If you need to level the NN3, simply adjust the tripod leg heights.

Did one. Realized I need two. Dumb. Wish I could juz do one. Yah, I think there's a technique somewhere in the internet.

Guess so. The center of the lens should be correct. Just need to find the focal point of the Samyang lens. Too embarrass to post anything yet.

Stupid me. Anyhow, looking into hindenhaag's suggestion too. Plan to get new tripod. Current one is a traveler compact tripod. Wonder if the EZ-Leveler is necessary.

Thanks for the input.

mgsati
09-24-2011, 02:49 AM
When you get "black spaces", you did not move the tripod far enough to get free space between Nadir1 and Nadir2. You have to use the special set as seen in the pic. If you can not realize this with NN3 and your LRS = lower rail setting, move the third leg to center of tripod by shortening the legs length.

Heinz

Made a lot of mistake. Need to get my camera and NN3 setting right first. Need to change tripod, current one to hard to adjust and gets wobbly when using the nadir adapter. Like badders said, dump the ball head. Need to figure out a good way to move the tripod for nadir shots.

Thanks for the info and images.

hindenhaag
09-24-2011, 02:50 AM
When your legs glide fine in and out once opened, you can do without the leveller. Like my old Manfrotto 055ProB did. Carbon legs are a bit more sticky. Then it's worth. Plus the torque of the open Nadir Adapter often asks re leveling. Much more easy with EZLeveller II.

Once you know your DPD, just use a cord, place it near the third leg and move sideways for that distance.
Workflow, take the shots around, shoot Zenith, shot Nadir1 and then follow the workflow shown in the pics for Nadir2.

The original tutorial by DennisS, thx to his ideas we now have the Nadir Adapter. Old version with alpha masking in PS.

http://www.dlsphoto.net/Tutorials/NadarPatch/

Using PTGuiPro to mask out the tripod, you just should leave the bottom part of the shot. The walls will show different infos, compare the tripod in the mirror and the washing basin. When you do not mask it out, it will show "two washing basins".

Have a look to www.Feisol.de for a new tripod. Of course there are a lot other good ones.

Cheers,
Heinz

mgsati
09-24-2011, 06:56 AM
Thanks Heinz for all the advice. Man, it's going take me another month to figure out which tripod to get. Nowadays, I take quite awhile to figure out what's most suitable for my shooting needs.

mgsati
10-05-2011, 03:04 AM
Have a look at my setup. Despite whatever I tried, I still get the nadir adapter in my horizontal shots. Wonder what I have done wrong. If I do get the nadir adater out of my shot, the nodal point or no parallax point will be out. Any advice? Thanks guys.

Wim.Koornneef
10-05-2011, 04:01 AM
...Despite whatever I tried, I still get the nadir adapter in my horizontal shots...

If you refer to "horizontal" as is showed in your third example image then this is normal.
Your 4/3 sensor ratio camera has a wider view then 3/2 cameras hence with this wide lens (with a 180 degree diagonal view) you will see a small part of the nadir adapter and/or other parts of the panohead in the image.

This small part is in the corner of your images and it will be left out of the stitched result so it is not an issue.
If you think the small part has an impact on the brightness and/or color of the stitched result then you can very easy mask it out with PTGui and if you use a base template with masks that you apply to each new pano then you don't have to paint the masks again.

Success,
Wim

PS, not that it matters but unless your fourth example image is flipped horizontally I think the part that you point at is not the nadir adapter but the horizontal underrail.

hindenhaag
10-05-2011, 04:39 AM
Hi,

Do you crop in PTGui? Would be nice to see a shot. I do not think you will see it in the final stitch. Just crop inside the "blue ring" you seem to get. Just stitch and see if it matters. Or you may send a set of pics for us to stitch and find out.

You see "more" than on the normal 180º view with this sensor lens combination as Wim already pointed out.

Similar discussion on panoguide. http://www.panoguide.com/forums/tipsntricks/9742/

Regards,
Heinz

mgsati
10-05-2011, 06:02 AM
PS, not that it matters but unless your fourth example image is flipped horizontally I think the part that you point at is not the nadir adapter but the horizontal underrail.

Thanks for advice. The 4th example is still horizontal shot. Just place my setup very very close to a white wall to show the issue I'm having. It's the nadir adapter. I don't see this when I first tried without the adapter. Use my fingers to find the black part and my finger is touching the adapter.

Anyhow, I can now presume this is normal and there's nothing wrong with my setup?

mgsati
10-05-2011, 06:12 AM
Hi,

Do you crop in PTGui? Would be nice to see a shot. I do not think you will see it in the final stitch. Just crop inside the "blue ring" you seem to get. Just stitch and see if it matters. Or you may send a set of pics for us to stitch and find out.

You see "more" than on the normal 180º view with this sensor lens combination as Wim already pointed out.

Yup, with PTGui stitching, that black bit will be crop off. Just dat when I see all the single horizon images you guys shot, I didn't see the NN3 or its parts in the shots. Thought there's something with my setup.

I haven't really got down to shoot anything yet. Still trying to figure out which tripod to get.

Actually, the first 360 shot I did was handheld using the string method and it's almost perfect. So much for handheld and I did it with six shots.

mgsati
10-12-2011, 03:27 AM
Juz finished setting up my new tripod with the EZ-Leveller II and NN3 MKII along with all the quick release systems. Adjusted all the positions so dat the tripod legs look like the example on how to shoot nadir shot with the adapter. Then bummer, no battery power. Charging battery now. No spare but I could use the power cord. Too lazy to wire up. Will continue the next day.

mgsati
10-13-2011, 08:56 AM
When you get "black spaces", you did not move the tripod far enough to get free space between Nadir1 and Nadir2. You have to use the special set as seen in the pic. If you can not realize this with NN3 and your LRS = lower rail setting, move the third leg to center of tripod by shortening the legs length.

336335339341343340344©2011hindenhaag

Heinz

Just experiment earlier. Got a very small black space at the tripod third leg. Relook at your advice again. Realised where I have done wrong again.