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Forum: Mini-Challenges, Games, and Photo Stories 8 Hours Ago  
Game Stupid Camera Tricks (and Stupid Lens Tricks)
Posted By Thagomizer
Replies: 159
Views: 8,662
Reflections on a puddle.

Totem figure:




Galaxy:




Four:

Forum: Mini-Challenges, Games, and Photo Stories 1 Day Ago  
Thematic The Yard Birds Thread
Posted By Thagomizer
Replies: 1,774
Views: 112,595
All seen today while going through a local park on my way to work. All with the DA 55-300 on KP; most with some cropping.

Winterized goldfinch.



Duet:










My first robin of the year:




Spot the owl:






Nuthatch:



Male Cardinal:

Forum: Mini-Challenges, Games, and Photo Stories 10-23-2019, 10:09 AM  
Thematic Seeing Red!
Posted By Thagomizer
Replies: 263
Views: 5,257
Hi everyone;

We had a monthly photo contest for the colour red, but I'd like to start a regular thread for RED!

Red doesn't have to be THE dominant colour, but it should at least be the focus or accent colour. For example, red does not dominate this shot as far as the percentage of real estate it takes up, but it is the key or focus of attention:



Here are a few more to kick things off:












Look out! It's a RED ALERT! Join in, have fun!
Forum: Mini-Challenges, Games, and Photo Stories 11-28-2019, 01:26 PM  
Thematic Post Your Cloudscapes
Posted By Thagomizer
Replies: 3,463
Views: 170,911
Disipating stormclouds over London (Ontario):




Forum: Troubleshooting and Beginner Help 2 Days Ago  
Lens focal length for use on bellows
Posted By Thagomizer
Replies: 16
Views: 393
The "right" focal length depends on the size of the object you're shooting, how much of it you're wanting to show, and at what size you want it to be. I often go to greater than 1:1 for full body shots of small insects or portrait shots of larger ones. At higher magnification, depth of field gets shallower and shallower, so the orientation of your subject with regards to the thin plane of focus becomes an important consideration.

You can also reverse the lens you're using on the bellows with an M42 reverse adapter ring. Most non-macro lenses 50mm and shorter perform better for macro work when they are reversed. References linked above have information on lens reversal. You're already going without automatic diaphragm with the bellows, so reversing the lens on the front standard isn't really costing you anything. With shorter focal length lenses reversed on extension, you never face the problem, noted above by photoptimist, of your focus point ending up inside the lens when they're mounted normally on extension. Your working distance will be the flange focal distance of the reversed lens you're using. With Pentax lenses for 35mm film or DSLR, that distance is about 45mm. Because you're mounting it via the filter threads rather than the lens mount, you can use any brand lens, as long as you've got the right combination of reverse adapter and stepping rings to fit.

Here's one of my go to links for macro ideas:

CHEAP MACRO -- Buying or exploiting a lens for ultraclose work - PentaxForums.com

Have fun, and if you feel so inclined, share your results.
Forum: Lens Clubs 01-23-2020, 10:21 AM  
Macro by any means necessary club
Posted By Thagomizer
Replies: 541
Views: 107,851
More results from the reversed Q 03 fish-eye on my KP. I'm posting this on all three threads where I've been talking about this; "Reversed 03 fish-eye on KP", "Pentax Q mount macro reverse rings", and "Macro by any means necessary club."

Camera is tripod mounted on a focus rail. Electronic shutter with 12 second self timer for shooting, existing light using a diffused Ikea Jansjo light.

First some more "indutrial" targets. Printed number on a lens barrel:




Printing on a business card:





The edges of some small manilla envelopes:




Still industrial, but not mechanical. Multigrain bread...



and the surface of one of the seeds on the top of the bread.



Some closeup bug bits.

Our first subject, an unfortunate shield bug (?), which I found dead in a corner of the bedroom, under some stuff.

Here's the whole insect:



And a close-up of its eye:



Our second contestant is a cast-off cicada husk:



Some of its bits. The business end of one of its digging claws:



And spines at the (wrist? elbow??) joint of the same limb:



An adult cicada (found deceased).



A close-up of one of its eyes:



Because of the very limited depth of field, reversing the Q 03 fish-eye might best be used with flat subjects. More three dimensional subjects move out of the limited plane of focus very quickly in either direction; image quality is such that it might not be worth the trouble of stacking, though I'll let those who actually do focus stacking (of which I am not, as yet, one) decide this for themselves. I don't think this optic is a hidden gem that's going to take the photomacrography world by storm. That said, it is fun to play with and makes for a comparatively compact rig for high magnification shooting. If I'm feeling particularly optimistic (or masochistic) I might even try it in the field once weather is warmer.
Forum: Mini-Challenges, Games, and Photo Stories 02-11-2020, 08:54 AM  
Game Song titles (or lyrics) illustrated
Posted By Thagomizer
Replies: 232
Views: 5,164
Were you sitting on a cornflake when you took this one?
Forum: Mini-Challenges, Games, and Photo Stories 01-09-2020, 10:29 AM  
Game Stupid Camera Tricks (and Stupid Lens Tricks)
Posted By Thagomizer
Replies: 159
Views: 8,662
Walking the dog:



When i saw this one it reminded me of Balla's Dynamism of a Dog on a Leash.
Forum: Mini-Challenges, Games, and Photo Stories 11-30-2019, 04:04 PM  
Thematic Good as Gold
Posted By Thagomizer
Replies: 213
Views: 4,466
Snowy gold:







Forum: Mini-Challenges, Games, and Photo Stories 11-28-2019, 01:18 PM  
Thematic Good as Gold
Posted By Thagomizer
Replies: 213
Views: 4,466
Pedal boats at rest, Stratford, Ontario:

Forum: Mini-Challenges, Games, and Photo Stories 11-09-2019, 09:44 AM  
Thematic Good as Gold
Posted By Thagomizer
Replies: 213
Views: 4,466
Hardware gold:

Forum: Mini-Challenges, Games, and Photo Stories 10-23-2019, 11:44 AM  
Thematic Good as Gold
Posted By Thagomizer
Replies: 213
Views: 4,466
Here's another colour theme. This time it's YELLOW! Or GOLD like in the thread title. Either or both will work: I'm not going to quibble. The theme colour doesn't necessarily have to be the dominant colour, but it should be the key accent or focus of the image.

Here's my ante:

















Forum: Mini-Challenges, Games, and Photo Stories 02-11-2020, 09:58 AM  
Show me a Sign! Billboards,sign,bus ads,shop signs go here!
Posted By Thagomizer
Replies: 5,453
Views: 426,682
So, 30 points for each one?
Forum: Pentax SLR Lens Discussion 01-21-2020, 12:30 PM  
DA 16-85 WR,show us what it can do.
Posted By Thagomizer
Replies: 1,094
Views: 162,557
Owl is watching:







Forum: Pentax Q 01-21-2020, 01:44 PM  
Reversed 03 fish-eye on KP
Posted By Thagomizer
Replies: 14
Views: 807
Here's a Q lens used on a non-Q body. Cross posted with the "Macro by any means necessary" thread.

Having reversed SLR lenses (prime and zoom), and movie camera lenses for macro shooting, I wondered about the Q 03 fish-eye, reversed, figuring that its short focal length would produce even higher magnification than nanything I'd yet tried reversing. So, I got a hold of one. I attached it to my KP using a 49mm reverse adapter, a 37-49mm step up ring, and some masking tape around the front barrel of the lens to keep it snug in the step up ring. No extension is necessary to get the image circle to fill the APS-C frame. I don't know what would happen with full frame, though.

The combination isn't going to win any beauty contests...



It works, but it's very tricky. DOF is minimal. Working distance is very small, 9.2mm, the registration distance of the Q. For these test shots I used existing light, live view and self-timer. Getting flash illumination on the subject will be tricky. It's unlikely I would use this in my usual hand-held field shooting style. This set up is going to need a tripod.





Some results.

Horizontal field of view is less than 2mm. Here are a pair of millimeter marks on a ruler:




The knurled focus ring of the 8mm cine lens seen in the shots above:



Printing from a step-up ring box. The box was not quite squiare on; the left hand side of the image is sharper than the right.



and the price tag on it.



Here's a shot of the box with a ruler. The black and orange pattern in the shot above is just to the left of the price tag.



I'll have to try this out on more interesting subjects. I'll post results when I do!

I also want to try the 03 fish-eye as part of a wide angle macro relay system. These rigs tend to use small M12 "board" lenses (usually with larger maximum apertures than the 03 has), intended for smaller sensor CCTV or GoPro style cameras and the like. Watch this space for developments...
Forum: Pentax SLR Lens Discussion 02-05-2020, 01:23 PM  
Opinion time: what are your favorite manual lenses?
Posted By Thagomizer
Replies: 183
Views: 10,018
I've got one I'll have to play with more; I haven't really given it a good workout. It's a bit beat up; I had to replace the rubber grip on the zoom ring, but other than some abrasions on the finish, seems to be okay.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 01-08-2020, 08:25 PM  
Got Squirrel Shots? (In memorial of Rupert)
Posted By Thagomizer
Replies: 2,640
Views: 210,694
Here's my first contribution. Saw these ones on my way to work. Enjoy!







Forum: Mini-Challenges, Games, and Photo Stories 11-25-2019, 07:01 PM  
Thematic Light Painting and Light Trails
Posted By Thagomizer
Replies: 45
Views: 2,833
Under the waves:

Forum: Pentax KP 01-30-2020, 09:15 AM  
Focus adjustment using Manual Lenses in U4 mode
Posted By Thagomizer
Replies: 9
Views: 463
You might find this article, posted a few days ago, helpful:Achieving Better Manual Focus with the Green Hexagon - PentaxForums.com
Forum: Pentax Q 01-23-2020, 10:21 AM  
Pentax Q mount macro reverse rings
Posted By Thagomizer
Replies: 19
Views: 1,558
More results from the reversed Q 03 fish-eye on my KP. I'm posting this on all three threads where I've been talking about this; "Reversed 03 fish-eye on KP", "Pentax Q mount macro reverse rings", and "Macro by any means necessary club."

Camera is tripod mounted on a focus rail. Electronic shutter with 12 second self timer for shooting, existing light using a diffused Ikea Jansjo light.

First some more "indutrial" targets. Printed number on a lens barrel:




Printing on a business card:





The edges of some small manilla envelopes:




Still industrial, but not mechanical. Multigrain bread...



and the surface of one of the seeds on the top of the bread.



Some closeup bug bits.

Our first subject, an unfortunate shield bug (?), which I found dead in a corner of the bedroom, under some stuff.

Here's the whole insect:



And a close-up of its eye:



Our second contestant is a cast-off cicada husk:



Some of its bits. The business end of one of its digging claws:



And spines at the (wrist? elbow??) joint of the same limb:



An adult cicada (found deceased).



A close-up of one of its eyes:



Because of the very limited depth of field, reversing the Q 03 fish-eye might best be used with flat subjects. More three dimensional subjects move out of the limited plane of focus very quickly in either direction; image quality is such that it might not be worth the trouble of stacking, though I'll let those who actually do focus stacking (of which I am not, as yet, one) decide this for themselves. I don't think this optic is a hidden gem that's going to take the photomacrography world by storm. That said, it is fun to play with and makes for a comparatively compact rig for high magnification shooting. If I'm feeling particularly optimistic (or masochistic) I might even try it in the field once weather is warmer.
Forum: Pentax Q 01-23-2020, 10:21 AM  
Reversed 03 fish-eye on KP
Posted By Thagomizer
Replies: 14
Views: 807
More results from the reversed Q 03 fish-eye on my KP. I'm posting this on all three threads where I've been talking about this; "Reversed 03 fish-eye on KP", "Pentax Q mount macro reverse rings", and "Macro by any means necessary club."

Camera is tripod mounted on a focus rail. Electronic shutter with 12 second self timer for shooting, existing light using a diffused Ikea Jansjo light.

First some more "indutrial" targets. Printed number on a lens barrel:




Printing on a business card:





The edges of some small manilla envelopes:




Still industrial, but not mechanical. Multigrain bread...



and the surface of one of the seeds on the top of the bread.



Some closeup bug bits.

Our first subject, an unfortunate shield bug (?), which I found dead in a corner of the bedroom, under some stuff.

Here's the whole insect:



And a close-up of its eye:



Our second contestant is a cast-off cicada husk:



Some of its bits. The business end of one of its digging claws:



And spines at the (wrist? elbow??) joint of the same limb:



An adult cicada (found deceased).



A close-up of one of its eyes:



Because of the very limited depth of field, reversing the Q 03 fish-eye might best be used with flat subjects. More three dimensional subjects move out of the limited plane of focus very quickly in either direction; image quality is such that it might not be worth the trouble of stacking, though I'll let those who actually do focus stacking (of which I am not, as yet, one) decide this for themselves. I don't think this optic is a hidden gem that's going to take the photomacrography world by storm. That said, it is fun to play with and makes for a comparatively compact rig for high magnification shooting. If I'm feeling particularly optimistic (or masochistic) I might even try it in the field once weather is warmer.
Forum: Lens Clubs 01-21-2020, 01:45 PM  
Macro by any means necessary club
Posted By Thagomizer
Replies: 541
Views: 107,851
(Cross posted with the Q forum)

Having reversed SLR lenses (prime and zoom), and movie camera lenses for macro shooting, I wondered about the Q 03 fish-eye, reversed, figuring that its short focal length would produce even higher magnification than nanything I'd yet tried reversing. So, I got a hold of one. I attached it to my KP using a 49mm reverse adapter, a 37-49mm step up ring, and some masking tape around the front barrel of the lens to keep it snug in the step up ring. No extension is necessary to get the image circle to fill the APS-C frame. I don't know what would happen with full frame, though.

The combination isn't going to win any beauty contests...



It works, but it's very tricky. DOF is minimal. Working distance is very small, 9.2mm, the registration distance of the Q. For these test shots I used existing light, live view and self-timer. Getting flash illumination on the subject will be tricky. It's unlikely I would use this in my usual hand-held field shooting style. This set up is going to need a tripod.





Some results.

Horizontal field of view is less than 2mm. Here are a pair of millimeter marks on a ruler:




The knurled focus ring of the 8mm cine lens seen in the shots above:



Printing from a step-up ring box. The box was not quite squiare on; the left hand side of the image is sharper than the right.



and the price tag on it.



Here's a shot of the box with a ruler. The black and orange pattern in the shot above is just to the left of the price tag.



I'll have to try this out on more interesting subjects. I'll post results when I do!

I also want to try the 03 fish-eye as part of a wide angle macro relay system. These rigs tend to use small M12 "board" lenses (usually with larger maximum apertures than the 03 has), intended for smaller sensor CCTV or GoPro style cameras and the like. Watch this space for developments...
Forum: Pentax Q 01-21-2020, 04:19 PM  
Reversed 03 fish-eye on KP
Posted By Thagomizer
Replies: 14
Views: 807
Thanks everyone!

I'd toyed with the idea of the Q 03 for a while. Holding one up to my eye and looking through it in reverse was VERY dark. I really couldn't make out anything using this quick inspection method, so I didn't bother trying it.



Thanks! For me, it felt like a logical progression. Having seen what the higher and higher magnification I got with with reversing wider and wider zooms (28-80, 18-55, 10-20), I figured something wider still would yield even more. So, I finally got hold of the 03 at a very good price. Actually, I bought it after I took these test shots. I was very pleased that mounting was so easy, and that the image circle gave full coverage on my KP.

---------- Post added 01-21-20 at 06:23 PM ----------



I was pleasantly suprised too, given the slap-dash, down & dirty test set-up I used for proof of concept. I'll have to see if I can eak out any more image quality with greater care. I don't think it's ever going to be for pixel peeping. At this point I'm not focus stacking either, so whether it would be good enough for that techniques is an open question.

---------- Post added 01-21-20 at 06:25 PM ----------



Ooops. Sorry! At least it won't take up much space...:lol:

---------- Post added 01-21-20 at 06:35 PM ----------



I haven't done any proper measurement, but it looks like the horizontal field of view is about 1.3mm. Spread out over the KP sensor size of 23.5mm gives a magnification of approximately 18X. I did take a few shots with a bit of extension; I don't think the ruler shot was one of them, but It's possible it was. In that case, magnification would be a bit less (see above about being more careful...;).
Forum: Pentax Q 01-21-2020, 05:43 PM  
Reversed 03 fish-eye on KP
Posted By Thagomizer
Replies: 14
Views: 807
Good to know. I thought it might be the case, as my reversed Kinotel 1 1/2 inch 8mm covers APS-c without extension, but I didn't know for sure.

I'm assuming like DSLR lenses without aperture rings that the Q 01 standard prime (and the rest of the Q lens line-up, excluding the toy lenses) stays closed when not mounted on a body? Without the mechanical linkage that can be wedged open, there would be no way (without a lot of slaving over a hot soldering iron to put together some means for communication) to get a larger aperture. I'm lucky the 03 doesn't have a diaphragm to worry about. The toy lenses, which I assume also have no diaphragm, would be darker still. Looks like I fell into the right optic!

I think the 03 as the front end of a wide angle macro relay rig is going to take a bit more experimentation...

---------- Post added 01-21-20 at 08:03 PM ----------

P.S. Just found this thread (pretty recent, too) on reversing Q lenses on Q bodies: Pentax Q mount macro reverse rings - PentaxForums.com
Forum: Pentax Q 01-21-2020, 10:41 PM  
Pentax Q mount macro reverse rings
Posted By Thagomizer
Replies: 19
Views: 1,558
You're welcome! Certainly better than I expected as well. I'm going to be trying it with a set-up that includes a tripod, flash (or at least better light, probably my Ikea Jansjo) with diffusion, and a focus rail. I'll post my results here when I do.
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