The Six-Megapixel Club

kypfer · 07-05-2020, 12:44 AM - **4 Likes**

Originally posted by goatsNdonkey

*** You aren't using your Peleng 8mm on a full-frame digital Pentax are you? So far as I know all of the versions of the lens are designed to work on Cropped Sensor digital cameras only, and would be guaranteed to give a lot of vignetting on full-farme, but not just in corners.

My Peleng 8mm is an "old-school" full-circle fish-eye from my film days, bought new 30-40 years ago. It came with two "T2-Type" adaptors, for M42 and Nikon. I've never used the Nikon fitting.
When used on my APS-C cameras there is still some definite residual vignetting in the corners of the frame, so the optical design must be somewhat different to the Samyang lens.

From a few years ago on my *ist DS

**goatsNdonkey** · 07-05-2020, 07:33 AM

Originally posted by kypfer

My Peleng 8mm is an "old-school" full-circle fish-eye from my film days, bought new 30-40 years ago. It came with two "T2-Type" adaptors, for M42 and Nikon. I've never used the Nikon fitting.
When used on my APS-C cameras there is still some definite residual vignetting in the corners of the frame, so the optical design must be somewhat different to the Samyang lens.

From a few years ago on my *ist DS

I see. Your Peleng is NOT a re-labeled clone of the Samyang f3.5 8mm for cropped-sensor digital; it is easy to lose track of all of the different names they get labeled with. The Samyangs are designed to give a rectangular fish-eye image on cropped sensor.

If your Peleng fish-eye produces a full-circle fish-eye image, it seems to me, you have these choices:

1) Shoot it on [A] a full-frame 35mm film body or [B] a full-frame digital body and enjoy those wonderful full-circle fish-eye pictures.

2) Keep shooting it on a cropped-sensor digital body and crop the images enough to get rid of the vignetted corners. Note that you can be creative about that, cropping to a variety of rectangular shapes--including squares--not only the 2:3 side length ratio.

I have an old Samigon "180-Degree Fish-eye" lens attachment, meant to attach to the front of a film camera's normal lens to produce full-circle fish-eye images. I did experiment with mounting it on the front of my Penax-A 35-80mm zoom. Setting that host lens to about 75mm I could get corner-to-corner rectangular images with it on a cropped-sensor Pentax digital camera. I left the host lens aperture wide open and set the aperture on the Samigon according to directions.

Of course, your Peleng attaches directly to the camera, so you can't slip something between it and the camera to un-do the vignetting . . . . ******unless****** you tried a tele-converter somewhere in the 1.4x to 1.7x range ? ? ? If there is a "perfect" tele-converter, it will magnify just enough to remove the vignetting and not so much that it just turning the fish-eye lens into a mere wide-angle.

**goatsNdonkey** · 07-05-2020, 12:03 PM - **6 Likes**

Bower/Samyang f3.5 8mm
K110D

near closest focusing distance

(cross-posted)

kypfer · 07-05-2020, 04:13 PM - **1 Like**

Originally posted by goatsNdonkey

If your Peleng fish-eye produces a full-circle fish-eye image, it seems to me, you have these choices:

1) Shoot it on [A] a full-frame 35mm film body or [B] a full-frame digital body and enjoy those wonderful full-circle fish-eye pictures.

2) Keep shooting it on a cropped-sensor digital body and crop the images enough to get rid of the vignetted corners. Note that you can be creative about that, cropping to a variety of rectangular shapes--including squares--not only the 2:3 side length ratio.

Of course, your Peleng attaches directly to the camera, so you can't slip something between it and the camera to un-do the vignetting . . . . ******unless****** you tried a tele-converter somewhere in the 1.4x to 1.7x range ? ? ? If there is a "perfect" tele-converter, it will magnify just enough to remove the vignetting and not so much that it just turning the fish-eye lens into a mere wide-angle.

Cropping the fish-eye image is something I'm very familiar with, in many aspect ratios ... I uploaded an un-cropped image simply to demonstrate the extent of the vignetting

Maybe one day I'll be able to justify a s/h K-1 (or get very lucky!), in the meantime, if I really "get the urge", my *ist film camera will give me full-circle images

I do also have a Sigma 10-20mm and an EBC Fujinon 16mm "full-frame" fish-eye, so I've got most wide-angle requirements covered

Last edited by kypfer; 07-05-2020 at 04:16 PM. Reason: Punctuation

hvz448 · 07-06-2020, 05:42 AM - **7 Likes**

K110D with DA 18-55mm Kit Lens

ChristianRock · 07-07-2020, 08:58 AM

So at the K10D Club we have been talking about creating an All CCD Sensors thread. Would that interfere with the enjoyment of this particular club? I could create a 10MP CCD Club if the 6MP crowd would rather keep this more exclusively for the 6MP sensor cameras.

I think the All-CCD or the 10MP CCD would be a new thread, not replacing any Clubs...

**djb47** · 07-07-2020, 09:05 AM - **5 Likes**

Playing with paper clips K100D/F35-80

**goatsNdonkey** · 07-07-2020, 01:52 PM - **3 Likes**

K110 + Helios 44-2 f2 58mm + cropping

**carabez** · 07-07-2020, 09:48 PM

Originally posted by goatsNdonkey

K110 + Helios 44-2 f2 58mm + cropping

No image

Blocked?

**goatsNdonkey** · 07-08-2020, 04:26 AM - **1 Like**

Originally posted by carabez

No image

Blocked?

Look again. I think I fixed the problem.

jack002 · 07-08-2020, 08:31 AM - **3 Likes**

My K110D is still out there doing it

**paulh** · 07-08-2020, 03:05 PM - **3 Likes**

Little dog at the big creek - Vivitar 19/3.8 on *ist D:

**paulh** · 07-11-2020, 10:50 AM - **1 Like**

Disc golf no more - this area was recently converted to a dog park. Vivitar 19/3.8 on *ist D:

Sykil · 07-11-2020, 12:18 PM - **3 Likes**

Originally posted by paulh

Little dog at the big creek - Vivitar 19/3.8 on *ist D:

Oo cool spot.

Macro is hard. FA 80-200 with a M 50/1.7 coupled in front. Missed him in the first one but then I kinda liked the composition of him walking out of frame with the web bokeh behind. I got this *ist DL to fool around with infrared and have a cheap APS-C body to throw my lenses on for now. Honestly, the image quality is much better than expected. Edge detail is a lot better compared to the Q10 I've been using (which also fringes like mad in high contrast scenes) despite half the resolution. But being able to get such strong telephoto FoV from cheaper lenses is a huge plus, so they complement each other.

Dan James · 07-12-2020, 11:52 AM - **4 Likes**

Recently picked up a Samsung GX-1S, based I believe on the Pentax *ist DS2. I had one previously and shouldn't have sold it. This one was £35 with a Hoya 24/2.8 lens, which it seems is stuck wide open despite being listed as fully working. I informed the seller and they offered £10 refund, so the GX-1S cost me £25 with a free, if only partly usable, lens. This neatly complements my other 6MP CCD, the K100D which cost £26, and my 10MP CCD K-m (£31). Still amazing you can get such lovely little cameras for the price of a meal!

A couple with the GX-1S, both straight out of camera JPEGs, with zero post processing, just the way I like it!

Samsung GX-1S with Petri Auto CC 55mm f/1.8 M42 lens.

Samsung GX-1S with MC Zenitar-M2s 50mm f/2 M42 lens.

07-06-2020, 05:42 AM - 7 Likes	#1385
hvz448 New Member Join Date: Jun 2020 Posts: 24	K110D with DA 18-55mm Kit Lens Attached Images Last edited by hvz448; 07-06-2020 at 09:36 AM. Reason: Added another image.

07-07-2020, 01:52 PM - 3 Likes	#1388
goatsNdonkey Site Supporter Join Date: Jan 2016 Location: Fulton County, Illinois Posts: 3,730	K110 + Helios 44-2 f2 58mm + cropping Last edited by goatsNdonkey; 07-08-2020 at 04:25 AM.

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07-05-2020, 12:44 AM - 4 Likes	#1381
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,594	Originally posted by goatsNdonkey *** You aren't using your Peleng 8mm on a full-frame digital Pentax are you? So far as I know all of the versions of the lens are designed to work on Cropped Sensor digital cameras only, and would be guaranteed to give a lot of vignetting on full-farme, but not just in corners. My Peleng 8mm is an "old-school" full-circle fish-eye from my film days, bought new 30-40 years ago. It came with two "T2-Type" adaptors, for M42 and Nikon. I've never used the Nikon fitting. When used on my APS-C cameras there is still some definite residual vignetting in the corners of the frame, so the optical design must be somewhat different to the Samyang lens. From a few years ago on my *ist DS

07-05-2020, 07:33 AM	#1382
goatsNdonkey Site Supporter Join Date: Jan 2016 Location: Fulton County, Illinois Posts: 3,730	Originally posted by kypfer My Peleng 8mm is an "old-school" full-circle fish-eye from my film days, bought new 30-40 years ago. It came with two "T2-Type" adaptors, for M42 and Nikon. I've never used the Nikon fitting. When used on my APS-C cameras there is still some definite residual vignetting in the corners of the frame, so the optical design must be somewhat different to the Samyang lens. From a few years ago on my ist DS I see. Your Peleng is NOT a re-labeled clone of the Samyang f3.5 8mm for cropped-sensor digital; it is easy to lose track of all of the different names they get labeled with. The Samyangs are designed to give a rectangular fish-eye image on cropped sensor. If your Peleng fish-eye produces a full-circle fish-eye image, it seems to me, you have these choices: 1) Shoot it on [A] a full-frame 35mm film body or [B] a full-frame digital body and enjoy those wonderful full-circle fish-eye pictures. 2) Keep shooting it on a cropped-sensor digital body and crop the images enough to get rid of the vignetted corners. Note that you can be creative about that, cropping to a variety of rectangular shapes--including squares--not only the 2:3 side length ratio. I have an old Samigon "180-Degree Fish-eye" lens attachment, meant to attach to the front of a film camera's normal lens to produce full-circle fish-eye images. I did experiment with mounting it on the front of my Penax-A 35-80mm zoom. Setting that host lens to about 75mm I could get corner-to-corner rectangular images with it on a cropped-sensor Pentax digital camera. I left the host lens aperture wide open and set the aperture on the Samigon according to directions. Of course, your Peleng attaches directly to the camera, so you can't slip something between it and the camera to un-do the vignetting . . . . ***unless**** you tried a tele-converter somewhere in the 1.4x to 1.7x range ? ? ? If there is a "perfect" tele-converter, it will magnify just enough to remove the vignetting and not so much that it just turning the fish-eye lens into a mere wide-angle.

07-05-2020, 12:03 PM - 6 Likes	#1383
goatsNdonkey Site Supporter Join Date: Jan 2016 Location: Fulton County, Illinois Posts: 3,730	Bower/Samyang f3.5 8mm K110D near closest focusing distance (cross-posted)

07-05-2020, 04:13 PM - 1 Like	#1384
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,594	Originally posted by goatsNdonkey If your Peleng fish-eye produces a full-circle fish-eye image, it seems to me, you have these choices: 1) Shoot it on [A] a full-frame 35mm film body or [B] a full-frame digital body and enjoy those wonderful full-circle fish-eye pictures. 2) Keep shooting it on a cropped-sensor digital body and crop the images enough to get rid of the vignetted corners. Note that you can be creative about that, cropping to a variety of rectangular shapes--including squares--not only the 2:3 side length ratio. Of course, your Peleng attaches directly to the camera, so you can't slip something between it and the camera to un-do the vignetting . . . . ****unless**** you tried a tele-converter somewhere in the 1.4x to 1.7x range ? ? ? If there is a "perfect" tele-converter, it will magnify just enough to remove the vignetting and not so much that it just turning the fish-eye lens into a mere wide-angle. Cropping the fish-eye image is something I'm very familiar with, in many aspect ratios ... I uploaded an un-cropped image simply to demonstrate the extent of the vignetting Maybe one day I'll be able to justify a s/h K-1 (or get very lucky!), in the meantime, if I really "get the urge", my ist film camera will give me full-circle images I do also have a Sigma 10-20mm and an EBC Fujinon 16mm "full-frame" fish-eye, so I've got most wide-angle requirements covered Last edited by kypfer; 07-05-2020 at 04:16 PM. Reason: Punctuation*

07-07-2020, 08:58 AM	#1386
ChristianRock Pentaxian Join Date: Jul 2013 Location: People's Republic of America Photos: Gallery \| Albums Posts: 9,910	So at the K10D Club we have been talking about creating an All CCD Sensors thread. Would that interfere with the enjoyment of this particular club? I could create a 10MP CCD Club if the 6MP crowd would rather keep this more exclusively for the 6MP sensor cameras. I think the All-CCD or the 10MP CCD would be a new thread, not replacing any Clubs...

07-07-2020, 09:05 AM - 5 Likes	#1387
djb47 Site Supporter Join Date: Sep 2015 Location: Lenoir, NC Photos: Gallery \| Albums Posts: 1,561	Playing with paper clips K100D/F35-80

07-07-2020, 09:48 PM	#1389
carabez Site Supporter Join Date: Jul 2017 Location: Cinco de Mayo Photos: Gallery Posts: 793	Originally posted by goatsNdonkey K110 + Helios 44-2 f2 58mm + cropping No image Blocked?

07-08-2020, 04:26 AM - 1 Like	#1390
goatsNdonkey Site Supporter Join Date: Jan 2016 Location: Fulton County, Illinois Posts: 3,730	Originally posted by carabez No image Blocked? Look again. I think I fixed the problem.

07-08-2020, 08:31 AM - 3 Likes	#1391
jack002 Veteran Member Join Date: Sep 2014 Location: Missouri Photos: Albums Posts: 727	My K110D is still out there doing it

07-08-2020, 03:05 PM - 3 Likes	#1392
paulh Site Supporter Join Date: Sep 2010 Location: DFW Texas/Ventura County, CA Photos: Gallery \| Albums Posts: 33,268 Original Poster	Little dog at the big creek - Vivitar 19/3.8 on *ist D:

07-11-2020, 10:50 AM - 1 Like	#1393
paulh Site Supporter Join Date: Sep 2010 Location: DFW Texas/Ventura County, CA Photos: Gallery \| Albums Posts: 33,268 Original Poster	Disc golf no more - this area was recently converted to a dog park. Vivitar 19/3.8 on *ist D:

07-12-2020, 11:52 AM - 4 Likes	#1395
Dan James Senior Member Join Date: May 2017 Location: Sussex Posts: 163	Recently picked up a Samsung GX-1S, based I believe on the Pentax *ist DS2. I had one previously and shouldn't have sold it. This one was £35 with a Hoya 24/2.8 lens, which it seems is stuck wide open despite being listed as fully working. I informed the seller and they offered £10 refund, so the GX-1S cost me £25 with a free, if only partly usable, lens. This neatly complements my other 6MP CCD, the K100D which cost £26, and my 10MP CCD K-m (£31). Still amazing you can get such lovely little cameras for the price of a meal! A couple with the GX-1S, both straight out of camera JPEGs, with zero post processing, just the way I like it! Samsung GX-1S with Petri Auto CC 55mm f/1.8 M42 lens. Samsung GX-1S with MC Zenitar-M2s 50mm f/2 M42 lens.