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Forum: Do-It-Yourself 1 Day Ago  
How to discharge the photo-flash capacitor of a DSLR (here K-30/K-50/K-500)
Posted By Apet-Sure
Replies: 6
Views: 381
New tube guitar amps are very much alive and well, and they use new manufacture electrolytic caps, not ancient ones. Current flat-screen TV's use electrolytic caps in their power supplies; I've repaired them. Do a quick search on 'photoflash capacitors' and you'll see that the most common ones are electrolytic. There are many quality levels and price points. I wasn't trying to say that an electrolytic cap will always recharge itself, only that some can. I've seen it. Since most of us are not capacitor experts, it pays to err on the side of caution when working with a device capable of storing dangerous (to humans) amounts of energy. Leaving a clip lead connected across the cap's terminals continuously drains the charge in case DA is present.
Forum: Photographic Equipment for Sale 2 Days Ago  
For Sale: M42 Extension Bellows w/ PK adapter
Posted By Apet-Sure
Replies: 0
Views: 388
PentaxForums.com Marketplace Listing

Item for Sale
M42 Extension Bellows w/ PK adapter

Asking Price
15.00 USD

Item Location
North Carolina (United States)

Item Description
Photos are of actual item for sale. I only used it a couple times in my film days, and it's been stored in the case ever since. Before storing it, I always extended the bellows halfway to minimize stress on the folds. A few days ago I took it into a closet and shone a bright flashlight into the interior. I carefully checked for light leaks and saw none.

There is some missing paint on one of the knobs, and some light scratches on the rails. The bellows runs in and out very smoothly with no glitches. The m42 threads at both ends are pristine. The locking knob holds securely.


A metal flange-type m42 female to Pentax K male adapter is included and is like new.

I set the price with shipping to be just under what the least expensive similar items on the 'bay are going for.

Are you the original owner of the item being sold?
Yes

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Excellent

Shipping Destinations
United States

Shipping Charge
4.00

Shipping Services
USPS, UPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
I guarantee the item is as I've described. I'll carefully package the padded case inside a shipping box, so bellows should arrive OK. But just in case it's damaged in transit, I'll refund purchase and shipping costs with photo proof of damage. If you have any questions, ask before you buy. No refunds for "it's missing paint" since I disclosed that in the listing.

Please send me a private message if interested in the item!
Forum: Weekly Photo Challenges 2 Days Ago  
Caption Contest June 9 through June 16
Posted By Apet-Sure
Replies: 12
Views: 627
Well, gump and MarkJerling tied with three likes each. Since MarkJerling won a couple weeks ago, I gave the nod to gump. Thanks to everyone who participated.
Forum: Do-It-Yourself 3 Days Ago  
How to discharge the photo-flash capacitor of a DSLR (here K-30/K-50/K-500)
Posted By Apet-Sure
Replies: 6
Views: 381
One word of caution - well a few actually. Discharge an electrolytic capacitor and it's safe, right? Well, not necessarily. I didn't believe this until I saw it with my own eyes... An electrolytic capacitor has some ability to recharge itself after it has been discharged. Really. It has something to do with charge stored in the electrolyte which migrates back onto the plates. I've discharged electrolytic capacitors, then hooked a voltmeter up to verify safety. To my shock, I saw the voltage slowly rise from 0 back up to some significant value. Guys who work on vacuum tube guitar amplifiers (high internal voltages) discharge the caps, then leave a clip lead attached to both leads on the cap. Prevents nasty (and dangerous) surprises.
Forum: Troubleshooting and Beginner Help 5 Days Ago  
Pentax ME stuck shutter HELP PLEASE
Posted By Apet-Sure
Replies: 6
Views: 356
With no film in the camera it will have very little resistance.

I own an ME Super I bought new in the '70s. It's shutter no longer fires also. As I understand it, there is foam on the back of the mirror that was intended as a light seal. Over time this foam deteriorates and turns into goo. That prevents the mirror from flipping up, which prevents the shutter from firing. With the lens off, you may try to gently move the mirror with a toothpick or some such thing. That may confirm that you are a victim of 'sticky mirror'.


I never bothered to get mine serviced, but I just can't bring myself to throw this very nice camera away. I only shot maybe six rolls of film with it, and it's in mint condition. Maybe someone in the Marketplace would be interested in it for parts/repair?
Forum: Weekly Photo Challenges 06-12-2019, 08:38 AM  
Caption Contest June 9 through June 16
Posted By Apet-Sure
Replies: 12
Views: 627
Good start; keep 'em coming.
Forum: Contest Voting 06-10-2019, 09:29 AM  
On the run
Posted By Apet-Sure
Replies: 25
Views: 227
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:28 AM  
Wave runner
Posted By Apet-Sure
Replies: 20
Views: 213
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:27 AM  
Waterslide Friendship
Posted By Apet-Sure
Replies: 16
Views: 222
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:25 AM  
Roostertail!
Posted By Apet-Sure
Replies: 38
Views: 353
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:22 AM  
flyfishing action
Posted By Apet-Sure
Replies: 29
Views: 310
Outstanding!
Forum: Contest Voting 06-10-2019, 09:21 AM  
Splash
Posted By Apet-Sure
Replies: 34
Views: 272
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:19 AM  
Splashin' son....
Posted By Apet-Sure
Replies: 5
Views: 69
I would like to nominate this photo
Forum: Contest Voting 06-10-2019, 09:17 AM  
The hunter and the hunted
Posted By Apet-Sure
Replies: 44
Views: 450
I would like to nominate this photo
Forum: Troubleshooting and Beginner Help 06-08-2019, 03:02 PM  
ARRRGGGHHH!!! Dumbest thing I've ever done! May have ruined my camera. $%#^@#!!!
Posted By Apet-Sure
Replies: 27
Views: 1,765


You mean like taking your sister-in-law's pit bull and your camera for a walk at the same time? When the dog lurched against its leash while I was taking a picture, I lost my balance and the camera and I landed face down on a gravelly footpath, without the benefit of having a free hand to break the fall.
Forum: Weekly Photo Challenges 06-08-2019, 02:12 PM  
Caption Contest May 28 to June 04
Posted By Apet-Sure
Replies: 15
Views: 533
Forum: Weekly Photo Challenges 06-08-2019, 02:11 PM  
Caption Contest June 9 through June 16
Posted By Apet-Sure
Replies: 12
Views: 627
Thanks to MarkJerling for selecting my silly caption. As a reminder:



RULES:

Contest ends at midnight on June 16th, 2019.

Any forum member may invent and post a caption for the photo as a reply in this thread.

All readers of the thread, including those posting captions are encouraged to vote for any and all of the captions they appreciate by "Liking" them using the Forum's LIKE feature ('thumbs up" turns green when clicked). At the end of the contest period, the host will count the votes and report who won. In the case of a tie, the Host will break the tie, but will not otherwise submit a caption or vote.

The winner will be notified ASAP by the current host by PM and posting the winner in this thread. The new Host should post a link in this thread to the new contest thread.

Submissions should be via text (no video or audio files) - any caption, limerick, motivational poem or verse or prose is permitted - whatever inspires you to describe the photo or catch attention. Contestants may submit more than one entry but it must be in a separate post for voting purposes.

IMPORTANT:

Even if you do not submit an entry, please "like" any postings you feel deserve it as this is how the winner is chosen. If you DO SUBMIT an entry, please also find an entry that you like among your competitors efforts and "like" at least one of them as well. Enter often, vote more often, and most importantly, HAVE FUN !!! Remember, you can 'vote' for more than one entry if you choose to do so.

If the image is too big for you, edit your account "Settings and Options" for a smaller display size.

I can't wait to see what you all come up with for this shot, taken at a local park.
Forum: Weekly Photo Challenges 06-08-2019, 08:22 AM  
Caption Contest May 28 to June 04
Posted By Apet-Sure
Replies: 15
Views: 533
Thanks, y'all. As soon as I figure out how to start the next one I'll post it.
Forum: General Photography 06-07-2019, 09:04 AM  
Camera Lens vs. The Human Eye
Posted By Apet-Sure
Replies: 28
Views: 923
Thanks for the link Don. I had forgotten about Cambridge in Colour. Just like opening an aperture lets in more light, articles like this open our understanding of what's going on when we take a picture. The whole process involves at least five elements: lens - sensor - camera processor - eye - brain. Each element has its own strengths and weaknesses. We juggle all this each time we snap the shutter.


As a side note, I find it fascinating to compare our human visual system to others in nature. Some birds of prey can actually change the focal length of their eyes and 'zoom in' on prey; helpful when you are 100 feet off the ground. We see red, green, blue, and black/white. As I understand it, birds can see UV light frequencies. Then there's the mantis shrimp. Marine biologists claim that they have 16 different color receptors compared to our three. How many trillions of colors can they differentiate, and why do they need to? Inquiring minds want to know.
Forum: General Photography 06-03-2019, 11:33 AM  
A Proper Goodbye to Pentax
Posted By Apet-Sure
Replies: 12
Views: 1,676
I firmly believe that the right camera for you is the one that blends technical proficiency and ergonomics into a tool that inspires you and doesn't get in the way of the creative flow. Sometimes it's the 'pixie dust' sprinkled on the camera that makes you know it's the right gear for you. Hey, Sony sells a lot of cameras for a good reason, right? I hope your new rig lifts you up to even loftier photography heights than you've already attained.

If I'm not mistaken, my K-5IIs has a Sony sensor. I bought it after reading all the glowing reviews about image quality, among other things.
Forum: Photo Critique 06-02-2019, 01:26 PM  
Abstract CD with water drops
Posted By Apet-Sure
Replies: 5
Views: 574
When I saw this image my first reaction was 'Wow - that's cool!'. I think the fact that it is a plain old CD seen in a new and creative way is exactly what gives this shot dramatic impact. It's like an unexpected plot twist in a story or an ironic punchline in a joke. It catches you off guard and creates interest. The thing about abstract art - there are NO RULES. Just imagine and create. Personally, I like the shot just the way it is. The only thing I might have done is clone out the white lettering on the CD hub. I find it a little distracting on an otherwise wonderful image.
Forum: Photo Critique 06-02-2019, 12:53 PM  
Landscape 20-40+kp
Posted By Apet-Sure
Replies: 5
Views: 645
This is quite a striking composition; I love it. The colors are just fabulous. I might have been tempted to clone out the graffiti, but some consider that to be cheating. In any case, great image!
Forum: Pentax K-5 06-01-2019, 12:04 PM  
Auto-ISO conundrum solved
Posted By Apet-Sure
Replies: 4
Views: 418
My K10D does not have highlight correction, so I was unfamiliar with this behind-the-scene gotcha on a new-to-me camera.

Let's keep Adam happy and stop this thread from going any farther.
Forum: Pentax K-5 06-01-2019, 08:45 AM  
Auto-ISO conundrum solved
Posted By Apet-Sure
Replies: 4
Views: 418
My apologies for beating a dead horse. I should have searched the forum first before posting. I have done this on other topics.
Forum: Pentax K-5 06-01-2019, 08:14 AM  
Auto-ISO conundrum solved
Posted By Apet-Sure
Replies: 4
Views: 418
I recently picked up a K-5 IIs from a member in the Marketplace. As I fooled around with its settings and experimented, I noticed that sometimes I could not set the ISO lower than 200 on the top LCD. Looking at the Auto-ISO range in the menu (Rec menu page 3), I also could not set it below 200. Hmmm. I went to Custom menu page 1, item 3 (expanded ISO sensitivity) and turned this on. Back to the Auto-ISO range setting, and now I could set the low value to 160. An improvement, but why couldn't I set it lower?

This morning I happened to be reading a K-5 II/IIs review on D P Review, and ran across this tidbit:

'The K-5 II features a Highlight expansion function which applies to both JPEG and Raw; Shadow Expansion can also be applied to the camera's JPEG output. With Highlight correction activated, ISO 160 becomes the minimum sensitivity setting...'

Well, that explained it. Sometimes I had highlight correction turned on and sometimes not. With HC off, I can now set the ISO on the top LCD and in the Auto-ISO range in the menu all the way down to 80. Thanks D P Review. If this little caveat is mentioned in the Pentax manual or in Yvon Borque's e-book, I don't remember seeing it.
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