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Forum: Pentax Camera and Field Accessories 11-18-2011, 10:02 PM  
Landscape Tripod
Posted By JGB
Replies: 38
Views: 4,434
For the head, I love my Acratech:) I got mine without the leveling base, but if I want to do panoramic stuff, I can just stick it on top of my cheap manfrotto head as a leveling base that came on my monopod using the included brass thread adaptor. Ugly but extremely effective! This also lets me do panoramas vertically, admittedly not a very practical use, but sometimes fun, and the rest of the time it is mounted on my monopod as a portable light stand for flashes.

I bought a head another customer had returned. A few dings and chips and I saved 20%. Well worth it IMO.
The self cleaning is nice too, as is the adjustable tension depending on the size of the camera+lens. Another weird use of the monopod head is to mount it on top of the ball head instead, this lets me drop the ballhead over as a gimbal mount, while maintaining a normal instead of portrait orientation. The monopod heads from manfrotto are extremely durable and compact, and I carry it anyways, cheaper than adding a leveling base.

IIRC acratech also recommends you buy a rail if you plan to do panoramas, I bought a longer plate for something else that fits the arca swiss compatible plates, and it is close enough for my shorter lenses to get the center pivoting correctly.

One of their heads can be turned upside down to make the proper panning motion as someone here was discussion, I wanted it but the extra price put me off.

That bungee cord tip sounds usefull, I'm going to try it next time I'm out!
Forum: Photo Critique 11-18-2011, 08:07 PM  
People Patricia
Posted By JGB
Replies: 2
Views: 1,062
It does look unnatural, but the makeup, and the strange chair make me think of an unwilling queen for some reason, so if the idea of unwillingness was intended, I think it's very successful. Perhaps not as much if it was intended to be a natural looking pose.

I like the way the trees frame the chair, though I find the vignetting or darkening or whatever is going on in the bottom of the frame distracting, it draws my eye away from the model, and the texture in the trees because it is so different.
Forum: Pentax K-5 11-03-2011, 04:22 PM  
K-5 power/depth of preview switch incredibly stiff/stuck, help!
Posted By JGB
Replies: 21
Views: 4,525
I think it's more of a way for Pentax/London Drugs to let me down. Should have bought it from Henry's for the free 90 day warranty, and less expense. But hindsight or new issues doesn't help to resolve my issue. I am infuriated. Pentax turn around is now 6 to 8 weeks. This is ****ing ridiculous. I love Pentax, but having just spent over 3000$, which I will be unable to spend again on camera equipment within the next several years, I am a student, I rely on this equipment. Six weeks to TWO MONTHS to repair a simple switch, when the user has spent that kind of money less than 30 days before is insane, this should be a straight exchange IMO, or at least a reasonable level of service. They are also demanding the original receipt which I don't have, and am trying to get from London Drugs, while I would accept that if they at least had a decent level of service, with this poor level of repair service, and lack of help, I will never buy camera equipment from London Drugs again, and I'm seriously regretting my decision to stick with Pentax at the moment. I guess the warnings about trying to use anything but Canon and rely on it are reasonable, if unfortunate.
If anyone has any advice on how I could get this sorted out in an actually reasonable time frame for a very expensive, new piece of equipment I would really appreciate it.
Forum: Pentax K-5 11-02-2011, 10:29 PM  
K-5 power/depth of preview switch incredibly stiff/stuck, help!
Posted By JGB
Replies: 21
Views: 4,525
The problem with that though is that the turn around time from Pentax is longer than the break time I have I believe. and I also can't find my receipt, though I could just send a copy of my bank statement I suppose. Very frustrating on a camera I've only had time to shoot a few shots through! What causes it to get stiff like that? It feels to me like it's trying to force its way around on a rubber seal that is out of its groove.
Is it possible to pay for a rush job with Pentax, or would I be better off getting a local shop to do it?
Forum: Pentax K-5 11-02-2011, 10:04 PM  
K-5 power/depth of preview switch incredibly stiff/stuck, help!
Posted By JGB
Replies: 21
Views: 4,525
Basically out of nowhere, my K-5 on switch/depth of field preview switch has gotten stiff. I really mean nowhere, I turned it on, shot a few shots, turned it off, then 2 minutes later, camera still in hand turned it on again, and it wouldn't rotate properly, I have to hold the camera in my left hand and forcibly rotate it with my right. I'm guessing the seal has gone and screwed up somehow? London drugs won't exchange it, even though I'm within the exchange period due to a scratch on the screen(not related to my issue with a brand new camera.:mad:
Should've bought it at Henry's 150$ less and a decent warranty.


Any suggestions on how I can fix this, I can't afford the month of downtime for Pentax to fix it, I'm a photography student and need to be shooting for class, I just picked up a lens and the other stuff I needed for that, I can't afford a 2nd body.

First time I've ever bought new, and it's turning into a bad experience.
Forum: Troubleshooting and Beginner Help 02-19-2011, 04:50 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
Thanks for the link, I finally found someone with a printer, but it didn't work after 2 hours of fiddling!
I tried the garden thermometer trick, but with a 3 edged ruler instead. I decided on +5, though 0 wasn't bad either some of the time(I noticed about 1/3 shots wouldn't be focused correctly with adjustment turned off, and the camera set to focus on exactly the same spot(I'd move the lens a bit to force the camera to refocus each time) and occasionally it would get the focus spot on. A bit strange considering I was on a tripod, with the ruler well lit, SR turned off, etc.
Forum: Troubleshooting and Beginner Help 02-18-2011, 03:02 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
No worries.



Here's the chart I was thinking of, haven't a clue where I'd get a garden thermometer...

PENTAX DSLRs: PART-1. Free Autofocus Adjustment charts for front and back focusing problems. Good for Pentax, Canon and Nikon.
Forum: Digital Processing, Software, and Printing 02-18-2011, 02:27 PM  
.LCP file in computer, but not in Lightroom?
Posted By JGB
Replies: 0
Views: 3,589
C:\ProgramData\Adobe\CameraRaw\LensProfiles\1.0\Pentax\PENTAX (smc PENTAX-DA 35mm F2.8 Macro Limited).lcp


I find this in my computer, yet in LR 3 under lens makers there is no Pentax setting, only apple, sigma etc.

Since this is what I'm shooting, I would like to be able to use the correction feature for my images.
Is it only available with RAW images? If so, is there a way to manually add a version for jpeg? I'm considering switching to RAW, despite the file size, and that might be enough of a reason to finally go for it.
Forum: Troubleshooting and Beginner Help 02-15-2011, 09:40 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
LOL I'm a guy.

I have an example of it clearly showing out of focus face(can't even see the eyelashes) while center focused on it with flash at 1/180, but so far I've been hotlinking images from my gallery, the connection here is being a pain about uploading the new one at a decent resolution.
If I move the aperture to F 5.6, I can see eyelashes.
Forum: Pentax DSLR Discussion 02-15-2011, 09:10 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Are you're saying that a machine drawing 5-10x the power isn't going to cause any more harm, or cause it any faster?


I am not, nor have I ever denied that it IS harmful. It is.
I agree with you on that.

All my original point many posts ago was about was the level of protection I personally have used, seen other use, with an explanation while shooting people welding, and while learning to weld, and then doing it for my own projects and for work, as a comment that I have not experienced any negative effects from UV through the lens.



Tan lines are a description that is easier to get when reading words on the internet. While bent over welding on the floor, his shirt was in one position, sitting and standing it stays in another, the result, like the lines that people get from wearing bathing suit tops and sitting in the sun was pretty amusing.

Yes the more protection that can be used the better. Yes horrific injuries are possible with UV exposure, however most are longer term risks, or direct exposure to an arc.

I did not realize that severe injury was possible so easily, after working so long with it, and with others who have experienced no major effects, even after nearly 50 years of doing it the same way without seeing any signs of them.

So the discussion wasn't entirely for nothing, plus if I can find a way to get the address, someone's getting a free welding helmet:)
Forum: Pentax DSLR Discussion 02-15-2011, 08:48 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Especially if you stand behind him for the shot, a good flash reflected off the inside of his shield and he'll be sure to suggest a beer or two after the job's done too.:lol:
Forum: Pentax DSLR Discussion 02-15-2011, 03:12 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
That sucks. Do they even make large windowed helmets without it these days?

After all the talk about how bad it can be, I'm thinking of trying to find one to mail to the guy who welded up my rack recently, or at least some dark tinted welding glasses like for use with gas torches.
Automatic filters, or anything needing batteries will get used until it stops working, then chucked I suspect, I don't even know if he would wear a helmet, glasses I'm sure he would.


Good plan on the work camera, lol.
Definitely try a polarizing filter, makes the welding easier to see. Maybe flash as well, for me it seemed to help balance the picture a bit, otherwise everything near the torch is blown. Though it might drive the welder nuts!
Forum: Pentax DSLR Discussion 02-15-2011, 02:36 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Ouch that really sucks, 2 days is a fair bit of exposure, I'm surprised no one got on the welder's case before then.
Health and Safety should have chewed him out at least.

I certainly didn't say prescription/clear safety glasses were good for welding with, but they do help with reflected light, or accidents. IIRC though I've lost the link, people who wear glasses all the time have lower rates of cataracts and other sun damage to their eyes as well.





I've got a tan on my hands before(fiddly welds I couldn't manage in gloves, 4 hrs at least of welding, I was making some inflated steel sculptures of fish), and the guy building my bike got a sunburn(he was on antibiotics that make you UV sensitive, and there was probably 10 hours of welding that day)
Pretty funny to see since he was wearing a tank top, gave him some great tan lines when it was done.
Forum: Troubleshooting and Beginner Help 02-15-2011, 02:03 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
Thanks! When you input the one lens setting, does it remember it for each individual lens?(I'm assuming it won't remember for old manual lenses?)
I'm ready to do it(tripod etc all ready), I just have to find someone with a printer now.

I've never used live view before, even shooting while wearing a helmet I find it more pain than it's worth.
Even using the standard AF though, the camera has real trouble focusing on anything as I move which is a pity. I tried it with a 5dmk2 and had good luck, but with the 35mm ltd I'm always waiting for it to cycle the lens. I'm thinking of figuring out the hyperfocal distance, and taping the lens focus ring there so I can shoot while I ride.
Forum: Pentax DSLR Discussion 02-15-2011, 02:00 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Let me rephrase, I would not be wearing that level of dark shield+ additional wrap around shades, if I was welding 16ga mild steel with a small mig welder on a 30amp fuse, drawing a small amount of power.
Those OSHA recommendations have a high safety margin, and are designed with long term exposure in mind as well.


If I were photographing someone welding with the kind of power being talked about, the safety precautions I would take for the camera and my eyes would be much higher.


Lower power welding means lower level of UV, and therefore lower levels of risk, high powered equipment demands a higher level of precaution, and respect.

It's like the PPE and safety precautions for working with rubbing alcohol(like avoiding any contact with skin, gloves, proper ventilation, respirator etc). OSHA has quite a list of required equipment for that, which makes complete sense for industrial use with large quantities, and high levels of exposure risk.



7018 is Aluminium, isn't it?
That really sucks, was it just a small MIG setup, or something more powerful being used?


I like the latest shot a lot, it's cool to see the welder facing the photo, and still see the work being done at the same time.
Forum: Post Your Photos! 02-15-2011, 01:46 PM  
People Welding in Mexico
Posted By JGB
Replies: 5
Views: 3,213
Yeah, he welds all day every day. I don't think they have the money for a mask(3 hours of work cost me about 20$, and I got charged more than most) he had a little lens he could hold, but usually he needs two hands to work. When we did my rack he tacked everything in place looking at it, then ran the bead with his eyes closed since I was holding it aligned.
Forum: Post Your Photos! 02-15-2011, 12:04 AM  
People Welding in Mexico
Posted By JGB
Replies: 5
Views: 3,213
My bike's rear rack got broken, while I was waiting for the welder to have time to work on it with me(which I didn't get any shots of, it was a two person job so I was busy)

Here he is welding up a alternator bracket, the welding table was just a hydralic press, and the welder was an ancient and frequently smoking stick welder. it was turned on by jamming a couple bare wires into a loose homemade plug.

Forum: Post Your Photos! 02-14-2011, 11:53 PM  
People Elena-Marie, *maybe* the most beautiful girl I've ever shot
Posted By JGB
Replies: 6
Views: 8,585
The light in the third shot is the most successful I think, really like that one. All great shots.
Forum: Pentax DSLR Discussion 02-14-2011, 11:37 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Well I guess we'll have to agree to disagree on the exact severity of it, I just feel that it is best taken on a case by case basis, depending on the equipment being used rather than wrapping up far beyond what you need to, or being so far away that you don't get the shot you are looking for, when it can be taken at an acceptable risk level.
Caution is always better than uneeded risk, I thought my first few posts were pretty much SOP(cover up, minimize overall exposure for camera and self) Just that it is not quite as instantly hazardous as is sometimes made out.
I also stated the exposures my camera has been used for, with a polarizing filter in place.
It was mostly the additional layers of dark welding glasses behind the viewfinder that I'm not so sure are entirely needed.
Tried it once, couldn't get a good shot, could hardly see through the viewfinder.




I do prefer precautions where possible(like polarizing filters, and covering the camera body/hands with something natural)

However, I would not be wearing that dark a tint with additional glasses as well if I was welding 16 gauge sheet. So I think there is nothing wrong with balancing precaution and ability to get the picture you want.




Yes UV is dangerous, yes there are potential long term side effects if you get too much of it, and caution is always best. In most cases with the kind of equipment you find in home shops, it is not quite extreme enough to require multiple layers of equipment, and extra dark shielding behind the viewfinder as well with filters etc in place.


I can only say that in my experience I have not experienced any serious, or severely damaging effects, and I've been working with and around welders for the last 8 years off and on.
I have seen people get sunburn from welding for too many hours without a coat, but certainly not in short doses, and from that far away. I have had some minor discomfort (as you said, like sand) once or twice, due to someone starting a new bead while I was still adjusting what we were working on.


Prescription glasses DO cut the UV, not completely of course, but better than nothing, and better than no protection at all because it was getting in the way. My welding instructor frequently wore those or clear safety glasses rated for normal UV levels while teaching, not suitable for staring at an active arc, but he found them adequate for reflected light if there was a gap in curtains etc as did the students, or if someone hit a table while he was talking. He's been welding for about 45 years(retired except for the one course a year) I tended to wear some slightly more tinted polarized lenses, on before I walked in, and off only after leaving but I was welding all day then.




I am not saying go and stand nude around a welder, or stare into it, just that it is possible to minimize risks and still get the shot you want, without big lobster mitts, a full coat, additional welding tinted glasses and a mask behind the viewfinder etc.

overexposure to the sun will also give you skin cancer, and reddened skin too.

No it is not the same as perfect PPE,
but as a photographer, you would not be exposed the same way as someone working 40 hours a week with a welder.
if you are comfortable with additional kit, then I would go for it, and certainly in the higher exposure risks(like welding AL).

Some common sense precautions(long sleeves, natural fibers, some form of safety glasses, even better with a reasonable tint(yellow or light green) is quite sufficient in most cases for taking a few pictures.

There are once in a million injuries like the one about the reflected UV off a window(one I saw recently was someone blowing their thumb up full of air because of a small cut, despite having done the exact same steps for over 25 years, if I hadn't seen it in person, I never would believe it, it took us a lot of work with a syringe to suck most of the air out before it could go anywhere else in him and then a trip to the ER to get it sorted)

I would be curious about what type of equipment was being used when the blindness from a window reflection occurred. I would bet it was more than a regular MIG/TIG setup in a small shop. If not, then I am very surprised.


Back on the topic of the picture, I like the balance of seeing the welders hands, but no faceshield, and the orange of the gloves with the glow through the metal. Do you have any more pictures from that?
What was your friend working on?
Forum: Pentax DSLR Discussion 02-13-2011, 05:13 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
I don't understand why that's the case, but I suppose it must be. I've shot pictures of Tig and Mig welding, and done a good deal of both, as well as holding pieces in places for hours without a shield, though I look away and close my eyes to minimize it.

I can certainly imagine that a direct flash from a mig welder's arc looking at it could be painful, but reflected UV around the viewfinder, and certainly the view of the arc through the lens has yet to bother me. Even regular prescription glasses will cut it to large extent, a camera much more so.


I'm not saying it is not a hazard, and a real risk, just that it is possible to balance precautions with getting the picture you want, understanding that a small amount of reflected UV from walls, or around a viewfinder will not blind you or make your eyes fall out.
Not that it is without risk entirely.


No, in his case it is poverty. Nothing else.
Forum: Troubleshooting and Beginner Help 02-13-2011, 03:20 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
Sorry, the second is outside, that's the front patio, with flash, but underexposed a bit intentionally to show that it was night.

I'm finding it way too consistent, even with flash, the subject is always slightly out of focus, and the background(if it is within a foot) is always in focus.

Thanks, that was why I tested the LV vs AF points first, to see if it was an issue with my lens(it wasn't)
I get slightly better results with the kit 18-55 lens, I've just started shooting with flash and f 5.6 or smaller, good enough for the internet, but not crisp and nice like I was getting earlier on. This is an example of focus I'm pretty happy with considering it was a quick snap while in the middle of eating and him throwing something at me, but same kind of distance and lighting now even on a tripod with flash, and a still subject and I get blurry faces, despite doing everything the same, or more carefully, it just isn't turning out. I can post this older one, because it was already uploaded to my gallery.



My most recent examples(I'm having trouble uploading again, the joys of cell phone based internet) are a boy sitting 1' in front of a wall with texture, center focus right between the eyes from 5' away, bright overhead lights and flash at 1/180. The wall is again clearer than the subject, the eyes are showing obvious signs of lack of focus especially(no eyelashes visible)
If I shoot at a 45 degree angle to a wall(highly patterned, easy to focus on) at F 2.8 I can clearly see the focus plane is not where I focused.

I'm going to try and set up my tripod and do some testing, but first I have to find someone with a printer to print a test sheet, a bit tricky where I am right now.
Forum: Pentax DSLR Discussion 02-11-2011, 08:06 AM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
I'm not saying they won't cause damage. Just that you won't feel it, it's not like your eyeballs instantly begin to peel apart if you see a bit of glow around your hand, or reflected off a wall. YES it is not good. But I don't like the way it is presented as though you will instantly injure your eyes painfully seeing any light involved with welding, nor will it damage your sensor as far as I can tell, I believe cameras allow much more IR through than UV, and IR from a laser is much more focused.

It definitely does cause floaters if you do a good enough job of it and stare at a bare arc for enough time. I just don't buy that you'll get it seeing it through a camera lens. Even a pair of good old clear glasses will cut down a huge amount of the UV light.

Case in point, the guy who welded up my bike most recently doesn't even OWN a pair of safety glasses, and he is welding 8-10 hours a day.
Is there risk of damage: yes. Can it be uncomfortable, if you stare right at the arc for too long, yes.
Is it instantly going to melt your eyeballs? No. Should it stop you from shooting the photo you'd like, because of fear of the reflected light? Depends on your tolerance for risk IMO the risks from that are fairly low.

I like both the shots posted in the thread so far!
Forum: Troubleshooting and Beginner Help 02-11-2011, 07:50 AM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
That's an interesting point, does the Diopter affect the focusing mechanisms in the camera?(mine is set to the farthest right setting, as I am pretty nearsighted)

I don't think it's motion blur, it's too consistent throughout ALL of my photographs of people, even synched 180/flash is showing the same issues, the wall behind will be in focus, the subject is clearly out of focus.

Does live view use AF sensors, or contrast focusing? It is perfectly in focus, which is making me suspect something might be wrong with the AF sensor itself. Happens in daylight, artificial light, everywhere.


I'm always shooting manual mode, center focus, center meter, except if I'm busy at the same time, then I tend to shoot P mode, and control my aperture, let shutter speed do what it needs to to adjust. I've tried it shooting at walls to, focus point is always behind where I aimed.

I'm shooting a K7 with 35mm LTD Macro.
I WAS getting razor sharp images before, even down to 1/15 handheld.
I use the AF button separately from the shutter button, so I can get SR started before focusing by half pressing it, allowing me to shoot as soon as I get a lock.

I've tested it over and over, and my focus is never actually on the point I focus on.
Forum: Troubleshooting and Beginner Help 02-09-2011, 08:23 PM  
Focus correct with Live view, but not through the viewfinder?
Posted By JGB
Replies: 28
Views: 12,215
I'm shooting a 35mm LTD macro.

I've been starting to wonder why I keep ending up with blurry pictures of people when I have center focus on, I focus directly on their face(usually on an eye) and end up with bad results. I thought it was me screwing up somehow.
Playing around with it in other ways, it seems to give me great shots still really close up, when I zoom it it's still crisp, but at longer distances it just sucks.
I've been able to recover somewhat with sharpening, but it still isn't good.
I noticed that if I use Live View, I get a consistently good focus.

Is this a sign that I should use one of the focus adjustment charts?

It is spoiling some otherwise really good shots.




This one came out ok after a lot of sharpening and fiddling around, but I focused on her right eye, and it's clearly not focused there.

most of the others are way worse, like this, consistently.



Is this just me aiming badly, or could this be an actual issue with the camera? It seems to me that is it too consistent, I have it set to always center focus, but I'm frequently getting the background in focus when I aim at people's faces.
Set to full auto focus I tend to get slightly better results, but still not what I'd call crisp by any stretch of the imagination, except for very close up shots.
Forum: Pentax DSLR Discussion 02-09-2011, 03:03 PM  
Welding
Posted By JGB
Replies: 44
Views: 12,571
Too bad I didn't read all these safety tips before shooting pictures of welding, and relative close ups, and longish exposures including the welding arc.:lol:
shot both stick and TIG welding being done this way.
I think I remembered to use a a filter once, after I realized my favorite shot of a welder came out from it.

I use a polarizing filter most of the time, I find it really helps with the sky, unfortunately I have just learned I was doing it wrong the whole time(Linear filter I assume because it changes the level of darkness in the sky when I rotate it)

For welding, it seems to work fantastically, giving much better definition.
If using lightroom, I like to bump the clarity up, I find most welding arc shots will take on a bit of a star effect if you do that, and use recovery/fill light to balance some of the difference out.


The bit about spatter etching lenses is very true, I've etched the sapphire crystal of my watch with spatter unfortunately.
I don't know about the whole safety glasses requirement, I shot looking right through my viewfinder, with so many layers of glass, I'm not worried about getting flashed, but I do make sure not to look up.
I've definitely seen the arc with my eye naked a few times in my life, not the best thing to do, but if you're quick it won't hurt physically anyways, it's not that potent. The potential damage from it is certainly dramatically lower than that of a laser, I have had my sensor exposed for up to 1/15th with no filter(other than the lens, which filters UV anyways to a large extent I believe) and no damage yet. I wouldn't try that with a laser, which is visible light spectrum, and much less diffused.

Those lasers are much, much more potent, and focused in a smaller area too.
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