Zenitar 16 FE- presentation and samples

Started Mar 18, 2006 | Discussions
OP Jonas B Forum Pro • Posts: 14,596
Re: Estimate of FOV

ptodd wrote:

Well, they did ask what the FOV for a specific lens on a specific
class of camera was, didn't they?

Now I guess so. I didn't get yjay at first glance. Im sorry as I obviously bored you with stuff you allready know of.

I remember Richard Day had a good FOV overview withthe Zenitar included. I didn't nookmark it, maybe somebody else can fill in?

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Jonas

ptodd
ptodd Senior Member • Posts: 1,327
Re: Estimate of FOV

Jonas B wrote:

ptodd wrote:

Well, they did ask what the FOV for a specific lens on a specific
class of camera was, didn't they?

Now I guess so. I didn't get yjay at first glance. Im sorry as I
obviously bored you with stuff you allready know of.

Nonono, don't be sorry. This is only stuff that I've picked up in the last few months reading these forums and so on... I'm just one of these smart alec 'expert' newbies you see in places like this...

I just hope any misinformation I might spread is quickly corrected, so the hive mind can continue to learn unhindered by my half digested regurgitated jargon...

I remember Richard Day had a good FOV overview withthe Zenitar
included. I didn't nookmark it, maybe somebody else can fill in?

Sounds useful, if someone can...

Take care,
Peter
--

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richardday Veteran Member • Posts: 7,972
Here you are - Zenitar FOV comparison

Jonas B wrote:

I remember Richard Day had a good FOV overview withthe Zenitar
included. I didn't nookmark it, maybe somebody else can fill in?

http://forums.dpreview.com/forums/read.asp?forum=1036&message=15837817
--
Richard Day - 'Carpe Diem!'
Gloucester UK

OP Jonas B Forum Pro • Posts: 14,596
Re: Here you are - Zenitar FOV comparison

Thank you Richard!

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Jonas

richardday wrote:

Jonas B wrote:

I remember Richard Day had a good FOV overview withthe Zenitar
included. I didn't nookmark it, maybe somebody else can fill in?

http://forums.dpreview.com/forums/read.asp?forum=1036&message=15837817

Alien
Alien Contributing Member • Posts: 600
Re: a FOV question... and to Dr C as well,

Jonas B wrote:

Thank you stranger,

You're wellcome earthling.

it's always good to know some stuff comes to use. Thank you to you
also, Dr C.

Dr. C?

For the question: FOV (as in Field of View) is determined by the
imaginers size together with the lens' focal length (FL). That's
why you see the somewhat odd expression "cropping factor" all the
time.

Yes, I have even found a formula for calculating the FOV according to imagers dimesions and focal length. However, that formula doesn't work with fisheye lenses. Bad luck!

It should be fairly easy to put together a list with lenses of
various FL and give the FOV for them when used with a fSLR and with
a 1.5 cropping factor dSLR. I would guess it's availabale out there
someplace...

You aren't very specific but in general we can say something like
this:

28mm - "wide normal" equal to a 42mm lens used on fSLR camera
35mm - "normal", pretty much like the 50mm lenseswe are used to
think of as normal lenses for 35mm film cameras
50mm - "short tele" very suitable for head and shoulder portraits
for example
wider/shorter and more tele/longer than that takes too long to list
for now but I think you get the idea. The Zenitar 16FE is
interestening as it's a 180 diagonal degree real fisheye lens when
used with a fSLR. With our Pentax dSLR cameras it becomes a good
very wide, semi fishy lens giving pictures that either have a minor
fish-eye lens appearence, or after processing real decent
rectilinear pictures.
I hope that helps somewhat,

Thank you.

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Jonas

Alien wrote:

Dear Jonas,

Firstly, thank you very much for the outstanding information and
examples.

Do you know by any chance the FOV in degrees for a 1.5x crop camera?

Thank you very much in advance.

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Alien

 Alien's gear list:Alien's gear list
Canon PowerShot G11 Olympus OM-D E-M10 Olympus 9mm F8 Fish-Eye Body Cap Lens Olympus M.Zuiko Digital ED 14-42mm F3.5-5.6 EZ Olympus M.Zuiko Digital ED 40-150mm 1:4-5.6 R
Alien
Alien Contributing Member • Posts: 600
Re: Thanks, great! (n/t)
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Alien

 Alien's gear list:Alien's gear list
Canon PowerShot G11 Olympus OM-D E-M10 Olympus 9mm F8 Fish-Eye Body Cap Lens Olympus M.Zuiko Digital ED 14-42mm F3.5-5.6 EZ Olympus M.Zuiko Digital ED 40-150mm 1:4-5.6 R
Alien
Alien Contributing Member • Posts: 600
FOV Calculation Link

I have found the link for the calculation of FOV regarding rectilinear and fisheye lenses:

http://www.bobatkins.com/photography/technical/field_of_view.html

Hereby, my own question is answered too. I thank everyone for their efforts.

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Alien

 Alien's gear list:Alien's gear list
Canon PowerShot G11 Olympus OM-D E-M10 Olympus 9mm F8 Fish-Eye Body Cap Lens Olympus M.Zuiko Digital ED 14-42mm F3.5-5.6 EZ Olympus M.Zuiko Digital ED 40-150mm 1:4-5.6 R
Quiver New Member • Posts: 5
Newbie Question

Hi all, total newb here and was hoping you gurus could provide me some insight onto my following dilemma.

Ii'm considering on getting the DL kit and fitting it with a Sigma 10-20mm($650au). But then i saw the Zenitar on ebay for less than a thrid of the price ($200Au) and seeing that both can shoot very wide, I've become hesitant on which to purchase.

From what i can gather, one is rectilinear and the other is fisheye, and seeing some comparisons, the fish eye appears to distort significantly more around the edges. Im also aware of the opinion that the Zen is the best value for money but seeing that the Sigma is within my budget, which should i opt for?

Then again, my budget is rather tight and if I do go for the Zen, i could use the spare cash to get the FA50 f1.4 and "maybe" even a sigma 70-300mm macro for a little extra.

BTW how would you rate a general kit with the 18-55 kit lens, Z fisheye, 50mm f1.4 and Sigma70-300. Is there any redundancy in that?

Your feedback would be invaluable and much appreciated. Thanks!

Pasvorn Regular Member • Posts: 229
Zenitar packaging

I got my copy from Victor yesterday. Here's how he packed the lens, and the content of the lens:

1) From Russian with love:

2) Inside the mailing box:

3) Zenitar's box

4) The inside box - "sealed" - Russian's style

5) The lens in the pouch

6) What inside:

  • Lens in protective paper

  • manual with certificate of inspection

  • A pack of colour filters

7) Unwrapped the lens and display the filter packages

8) I think this is the Warranty/Certificate

Bigger images can be found here:
http://www.pbase.com/boonmark/zenitar_16mm_f28

Enjoy.
-Pasvorn

OP Jonas B Forum Pro • Posts: 14,596
Re: Zenitar packaging

Hi Pasvorn,

Nice series. One note about the smell: There is a faint air of something like bakelite when unpacking the lens. As from past times.

Thanks for adding info to the thread!

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Jonas

michaelaustralia Regular Member • Posts: 161
Same for me from Victor - the Z16FE is great fun (n/t)
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michael@australia

OP Jonas B Forum Pro • Posts: 14,596
Two more samples, and thank you!

Thank you all for posting samples! I think presentation of a lens, and it's quirks together with the praise, is a great service to all new to dSLR cameras .

Here are two more, trying to show the versatility of this lens (as if it is needed...):

When there isn't much space:

Landscape:

©Jonas B 2006, both pictures, DS with the Zeintar 16FE

These pictures are both from the Summer 2006 Post at:
http://forums.dpreview.com/forums/read.asp?forum=1036&message=19483337

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Jonas

OP Jonas B Forum Pro • Posts: 14,596
Update: PTLens and Proxel examples, [1.7 megabytes]

PTLens, DxO and Proxel examples, [1.7 megabytes]

Since a couple of days we have seen a new lens corrector tool: Proxel.Until now we have had some native gimp and PSP tools, and for Photoshop PTLens (also as standalone). DxO still don't support Pentax so let's forget them, totally now. Proxel is a new Photoshop plugin.

Some things have changed since this thread was started: PTLens is no longer freeware. You have to pay USD10 for a lifetime license. No big deal: you get a good tool that can correct lens distorsion, and also correct some CA problems (sometimes needed with the Zenitar!) and straighten horizonts (I often need that...).

Proxel, the newcomer, is payware. With a pricetag at EUR34 it's a little more expensive than PTLens. It comes as a Photoshop automation plugin only and has no other features than correct distorsion. So, what good is that idea?

Two things, both are important: you get two different parts with the download. First there is a standalone lens distorsion analyzer. Easy to use (if you read the manual the first time...) and it provides you with good profiles for any lens you have in a few minutes time. Great stuff. The other important feature is that Proxel instead of squeezing the adjusted picture into the canvas instead stretches the canvas, while maintaining the original pixels in the center of the picture. More about that in this thread where John Bean presents his early findings:

What does it look like? Here is sample picture from one of the posts above:

Copyright note: All pictures in this post are ©Jonas B, 2005, 2006

I'll take the same picture and run it in different ways. Here is for a start:

Above: Picture 1, opened in photoshop (ACR), nearly no PP, 50% size, usm

Above: Pic 1 again: a 100& size, a crop of the center part

Above: Picture 2, opened and treated with PTLens, standard Zenitar profile (which possibly not longer is delivered with PTLens if you buy it but instead superseeded by a new database, see next picture). Again 50% size, same usm treat as the pictures above

Above: Picture 2 again, but at 100& size, a crop of the center part

Above: Pic 3: Here we have the "new" version of PTLens correction using the Fisheye setting. We can see that the picture no longer is cropped at the sides, but instead at the top and bottom. There is a slider deciding what amount of anti fisheye correction the picture gets. Maybe I dragged the slider a "%" or two too much to the right. Or not.

Above: Picture 3 again but at 100& size, a crop of the center part

Above: Picture 4: Now the original pic is treatened with Proxel and the homemade profile. It is still 50% but somewhat bigger as Proxel enlarges the canvas to fit the final picture.

Above: Pic 4: Again a 100% crop of the center part, again the same level of usm as all pics.

I hope these pictures can help when thinking of a possibly corrector.

You are welcome to add your findings or your own samples to the thread.

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Jonas

SelrahCharleS Senior Member • Posts: 2,701
My Zenitar examples...

All shot with the Pentax *ist DS and Zenitar at various apertures and shutter speeds... I will list which shots I used PTLens on to correct fisheye distortion. Sorry I dont have a before/after example.

Uncorrected for fisheye distortion

Corrected for fisheye distortion

Uncorrected

Corrected

Uncorrected

Uncorrected

Uncorrected, but with flare and hotpixels cloned out...

Uncorrected, also with flare cloned out

Uncorrected

Corrected, I think

Uncorrected

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Whats more important to you? Taking photographs that have great image quality, or taking photographs that are quality images?

SelrahCharleS Senior Member • Posts: 2,701
Great photos...

I really really like the first one... and the last one too.
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Whats more important to you? Taking photographs that have great image quality, or taking photographs that are quality images?

PhotoMoto Contributing Member • Posts: 922
Re: My Zenitar examples...

Very nice Selrah :). The first one is especially nice. Leave it uncorrected... Love it that way :D. Thanks for sharing :). Ugh I don't want this lens! :(.

D TONG Senior Member • Posts: 2,555
Re: My Zenitar examples...

SelrahCharleS wrote:

All shot with the Pentax *ist DS and Zenitar at various apertures
and shutter speeds... I will list which shots I used PTLens on to
correct fisheye distortion. Sorry I dont have a before/after
example.

Like you I have been playing around with the lens too. I like your pict particularly the 2nd last one. I had no clue until now that a different angle of shots gives you so much enjoyment and pleasant surprise.

I am not too thrilled with the defishing software. I would rather keep the original shape/curve which is not a huge deal for a lens of 16=24mm.

Daniel, Toronto
http://www.pbase.com/danieltong

SelrahCharleS Senior Member • Posts: 2,701
Re: My Zenitar examples...

thank you... I dont defish most of the time myself, unless I have straight lines near the edges. I find myself composing the photo so distortion does not have to be corrected usually though.
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Whats more important to you? Taking photographs that have great image quality, or taking photographs that are quality images?

D TONG Senior Member • Posts: 2,555
Zenitar 16 birdie shot series
Sinnettc
Sinnettc Veteran Member • Posts: 4,511
Zenitar & Proxel (4 lg imgs)

These are from my Zenitar LBA post

Sunset, uncorrected

Sunset corrected

Power Tower uncorrected

Power Tower corrected

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