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Forum: Troubleshooting and Beginner Help 12-16-2014, 08:08 PM  
soft/blurry photos below f8 with SMC Pentax-DA 18-55mm F3.5-5.6 AL II
Posted By Capslock118
Replies: 21
Views: 3,116
It occurred to me that the 18-55 i currently own is actually my second lens from that line. I had my first replaced because the focus ring became jammed. So I went back to see if i'm crazy and randomly picked out a photo for comparison. Not the sharpest, but...

-it's an indoor photo in low light
-f5.6
-iso 200

and the results are completely different compared to the first set I posted with. No way would I be able to use iso 200 with the current lens, let alone f5.6
Forum: Troubleshooting and Beginner Help 12-16-2014, 07:26 PM  
soft/blurry photos below f8 with SMC Pentax-DA 18-55mm F3.5-5.6 AL II
Posted By Capslock118
Replies: 21
Views: 3,116
I took some photos outdoors mid-day with overcast. I tried live view 4x manual focus as @starjedi suggested so I have a question about that. When I tried LV 4x manual focus, I could not get a sharp focus. Mainly, I took a picture when the shot was more in focus than not, but all the same, at the most ideal it was still blurry when focusing in live view. So is this expected behavior?

Anyway, my lunch was cut short but I managed to take a couple of comparison shots between my 18-55 and 50-200. The test shots were not a exactly precise, but I took shots between f5.6 to f13 for both lenses. All of the shots using the 18-55 were not sharp and every photo from the 50-200 was sharper than anything the 18-55 produced.

Obviously a handful of variables were introduced to compare the two lenses, but I think the general idea is that I am able to get sharp pictures using auto-focus with a different lens.

Just to give you an idea and some fun, here are some pictures of lichen, cropped to highlight the softness:
Forum: Troubleshooting and Beginner Help 12-16-2014, 07:10 AM  
soft/blurry photos below f8 with SMC Pentax-DA 18-55mm F3.5-5.6 AL II
Posted By Capslock118
Replies: 21
Views: 3,116
@cats_five - no uv filter, this lens is naked.
Forum: Troubleshooting and Beginner Help 12-16-2014, 04:58 AM  
soft/blurry photos below f8 with SMC Pentax-DA 18-55mm F3.5-5.6 AL II
Posted By Capslock118
Replies: 21
Views: 3,116
Wow what help, thank you all so much thus far. I'll respomd to each of you

@starjedi - yes I have tried manual focus in live view when trying a focus chart but I didn't have confidence in it. The camera seemed to perform differently in live view. I'll try this again after a few suggested it.

@deadjohn - I noticed it said macro too but I'm not sure why. It was mostly zoomed in (~45mm) but the base of the camera was about 2'-3' away from the focus target.

@hamiltom - my experience is almost consistent with yours except the soft focus for my lens seems to be at any focal length, not just at the extremes. These shots for instance were around ~45mm.

@aleonx3 - I tried fine adjustment when I used a focus chart but only when I was using f5.6, I'll try that again under another aperture.


@clackers / @paulh - center focused but I'll note that I'm pretty sure ff or bf is happenening because after the camera focuses I can still improve the focus by a bit, always a counter clockwise adjustment by a hair.

@sterretje - I'll test daylight today. This issue came up because of focusing problems in the daylight.

So curious question: what does live view benefit from that view finder does not? I've been blaming the lens so far because my 50-200 doesn't seem to have a problem, but since I definately cannot use that lens indoors my perception might have some bias. Informal outdoor testing seemed sharp though I'll get some outdoor shots today.
Forum: Troubleshooting and Beginner Help 12-15-2014, 07:33 PM  
soft/blurry photos below f8 with SMC Pentax-DA 18-55mm F3.5-5.6 AL II
Posted By Capslock118
Replies: 21
Views: 3,116
Hi everyone,

I was hoping I could get a second opinion on this. At first I thought the lens was busted because it wouldn't focus at any zoom, and i also thought it was for really silly reasons, but after I started taking test shots I'm pretty sure the issue is the lens' ability to stay sharp at higher apertures (which would conveniently match up to reports in the lens review database). I took a handful of example shots indoors and at night, so I tried to eliminate as many variables as I could.

with my K5:
-used a camera stand
-used mirror-up remote shooting
-used iso 400
-used single, center auto-focus (targeted on the hurricane glass)

The fun part is that the photos are much sharper as the aperture goes past f8 even though shutter goes up to 2". Now, I realize that this kit lens has unfavorable reviews in the lens database here for soft/blurry photos when aperture is open wide, but my results seem a bit excessive to me. This is also best case for my lens given all the controls to take these shots, practicall it seems that f10 or smaller is best. The reason I even looked into this was because I was taking casual shots outdoors in broad daylight and all of the photos were all unusable, I had initially thought it was an auto-focus issue.

Are these lenses really that bad at the wide end or is my lens worse off? (as a side, I tried using a focus calibration chart and it seemed like, when wider than f8, the lens was not sharp within the area that was focused. I did notice a little but of front-focusing but that seems like a minor problem to this).

Below the EXIF, but in order:
1) f4
2) f5.6
3) f8
4) f10
5) f13
Forum: Troubleshooting and Beginner Help 11-13-2013, 02:01 PM  
Unfocused images possibly due lens contamination?
Posted By Capslock118
Replies: 10
Views: 1,320
It does, red light plus the beep to let me know it's "in focus". Eye piece focal adjustment is a good theory too. I'll check the eye piece first but it is strange that the only lens with an acceptable level of sharpness is the manual lense.

Edit: In fact, the only reason I even noticed this issue in the first place was because my wife was using one of our AF lenses (18-55) in broad daylight and all the photos were blurry. We thought maybe our eyes are starting to expect more from the cameras LCD screen what with retina displays and all, but importing the photos into my mac showed how imprecise the sharpness was.
Forum: Troubleshooting and Beginner Help 11-13-2013, 08:30 AM  
Unfocused images possibly due lens contamination?
Posted By Capslock118
Replies: 10
Views: 1,320
I have not checked the mirror and that's an interesting theory; it seems to fit. When I looked at the entire days photos it seemed like there was a clear line from when the issue started to occur. I figured it was the lenses because the 24mm lens has the best sharpness in my tests and it was that lens I swapped out for something else when the blurriness started to appear.

I'll take a look at that when I am home this evening but, how exactly do I check this? what should I do to clean them? I have some high quality microfiber cloth but no solutions of any kind.
Forum: Troubleshooting and Beginner Help 11-13-2013, 08:03 AM  
Unfocused images possibly due lens contamination?
Posted By Capslock118
Replies: 10
Views: 1,320
how does image stabilization affect the view finder?
Forum: Troubleshooting and Beginner Help 11-13-2013, 07:28 AM  
Unfocused images possibly due lens contamination?
Posted By Capslock118
Replies: 10
Views: 1,320
Hi There,

So I'll start with telling you when I first observed this behavior. One day as I was taking pictures I noticed that the images appeared blurry no matter the of the focus adjustment made; AF and MF didn't seem to make a difference. I swapped out my lenses and the issue still appeared. I first noticed this behavior after about a week of the camera bag in my car during the fall season (beginning of october this year).

So the behavior I noticed left me thinking it was a camera issue (K-5) but I thought that, if that were the case, why then was the resulting photo and the view finder both blurry? If it was the camera it should be one or the other, unless both the CCA and the view finder were both shoddy. So I tested all of the lenses I had in my camera bag, two lenses have AF capabilities and the rest are manual. My 24mm lens appears to have the most apparent sharpness while my long lens had the worst condition (although now that i think about it, my test was probably too close for my long lens), so I think the issue here is within the lenses.

Below are some test photos from each of the lenses. What can this issue be? Moisture? Mold? Is there a way to fix the lenses? if so is the fix something that I can DIY or are they too delicate?

I appreciate any free advice you can give, and if the lenses can be repaired and there is a reputable person here that does it for a living I'd be happy to get a referral.

thanks.
Forum: Sold Items 06-25-2012, 10:39 AM  
For Sale - Sold: Kiron 105mm F2.8 Macro
Posted By Capslock118
Replies: 4
Views: 2,359
Still for sale. no response from previous PMs sent out.
Forum: Sold Items 04-09-2012, 05:34 PM  
For Sale - Sold: Kiron 105mm F2.8 Macro
Posted By Capslock118
Replies: 4
Views: 2,359
PentaxForums.com Marketplace Listing

Item for Sale
Kiron 105mm F2.8 Macro

Asking Price
350

Item Location
New Haven, CT (United States)

Item Description
I am selling my legendary Kiron 105mm F2.8 Macro. It is an amazing piece of glass, but I find that I am not using it as much as I had hoped when I purchased it a year ago. I think someone else could have it and give it the attention it deserves. This lens is in beautiful condition.

Buyer is responsible for cost + 3% paypal fees and actual shipping costs.

Local buyers may also pay cash.

Are you the original owner of the item being sold?
No

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Excellent

Shipping Destinations
Worldwide

Shipping Charge
actual shipping costs

Shipping Services
usps, ups, fedex

Accepted Payment Types
PayPal Check/Money Order Other (Elaborate)

Return Policy & Additional Details
Full refund up to 10 days minus shipping costs and paypal fees.

Please send me a private message if interested in the item!
Forum: General Talk 02-10-2012, 05:54 AM  
The Scale of the Universe
Posted By Capslock118
Replies: 14
Views: 1,637
now that is one heck of a zoom lens...
Forum: Pentax DSLR Discussion 11-23-2011, 05:22 PM  
repair internal flash or buy an external flash
Posted By Capslock118
Replies: 11
Views: 2,943
I mean I get your point Ron but I wasn't really buying the whole "k100d is too old to be worth putting money into" thing because well, a: i want an external flash anyways and b: we don't have that much money to just throw around especially around the holidays when we bought this not 1-1/2 years ago. Yes, consumer electronics get old fast but we are not in the position to buy the new iPad every single year either; know what I mean? I agree though that fixing the built-in flash would be a terrible idea. You make a good argument though about the better handling of low light in the more recent cameras. Though, If I had the money, i'd rather just upgrade all the way up to the k-5 and call it a day; but then I'd still desire an external flash....you get where I am going here - it's like LBA but like I said, we are snapshot people.

You have all really re-enforced the idea of picking up an external flash. And, like it was stipulated, it will carry over to the next camera we buy and will probably be more fun to shoot in low light anyways.

It sounds like it does matter that I pick up P-TTL and not just any [something]-TTL; i just figured the model number would have eluded to whatever that [something] was. So i'll make sure anyways. I like the concept of learning manual; i have a lot of manual lenses anyways, but there is always a place for automatic when the situation calls for it....

....like trying to take a photo of an energetic baby and you don't have time to monkey around. :-D

thanks everyone!
Forum: Pentax DSLR Discussion 11-23-2011, 12:45 PM  
repair internal flash or buy an external flash
Posted By Capslock118
Replies: 11
Views: 2,943
big question though:

i am looking through the flashes in the pentaxforums database - when i take those and go to ebay a lot of listings might say "Nikon" or "Olympus"?

does this matter? how do I know if it does? I imagine that ttl or p-ttl from pentax is the same as nikon....no?
Forum: Pentax DSLR Discussion 11-23-2011, 12:43 PM  
repair internal flash or buy an external flash
Posted By Capslock118
Replies: 11
Views: 2,943
Maybe old to you; we bought it in 2010 as a refurb so it's new to us. Need a few more years out of it before we upgrade.



ok, that hits my original thoughts; I think I got what i wanted out of this discussion :lol:.




thought about that too; that be a hard sell to my wife since we already have a DSLR plus 2 film pentax slrs, and if we did that we would end up with two DSLRS with one that doesn't have a flash.

it be nice for both of us to have our own cameras; but it's not a necessity.
Forum: Pentax DSLR Discussion 11-23-2011, 11:30 AM  
repair internal flash or buy an external flash
Posted By Capslock118
Replies: 11
Views: 2,943
my k100D internal flash bulb has went bust.

I just got an estimate from Pentax's third-party that repairs cameras; they said ballpark estimate is $225 to repair more or less depending on parts required.

This camera was bought in 2010 as a refurb from best buy for $300.

So i've been wanting to buy an external flash anyways, but we are snapshot people; i wouldn't even call us amateurs.

so - external flash, get it repaired, or just take photos in good lighting instead of a repair?

we basically lost the ability to snapshot indoors though.

and I know I can get an external flash for that price point.
Forum: Site Suggestions and Help 06-28-2011, 06:49 PM  
Suggestion Contest threads now clogging forum
Posted By Capslock118
Replies: 19
Views: 1,554
every time i visit this site I wonder what the age group is here.

my impression is that moderators are adults, maybe 25% of conversation is by moderators?

some other folks here are adults - another 25% worth of conversation.

then a lot of folks are entitled baby boomers - maybe 25%

then the rest are younger than 18 - 25% just to total 100%.

if my theory stands then 50% of this site is littered with whiney entitled expletives...:lol::D:p
Forum: Pentax DSLR Discussion 06-23-2011, 11:01 AM  
Wait wait wait...Pentax Q vs K-r?
Posted By Capslock118
Replies: 37
Views: 10,752
lol - you can also say the pentium 4 is dirt cheap now compared to when it was first released...your guess needs a timeline...:D
Forum: Photographic Technique 06-23-2011, 04:32 AM  
A completely new sensor design - Lytros Light Field camera
Posted By Capslock118
Replies: 44
Views: 7,674
I'm 26 and I can guarantee you my kids will know what vinyls are - my 8 month old is already playing with the texture of vinyl casings; not that he knows what it is but the point is it's there and used. I think our latest vinyl is not 2 months old? when did the last radiohead album come out?




anyways - so this sounds like this camera could make it much easier to take macro shots :)
Forum: General Talk 05-09-2011, 07:14 PM  
bad ebay purchase, what would you do?
Posted By Capslock118
Replies: 43
Views: 5,836
i don't think it would be out of line to consider a refund, though i wouldn't say the lens you bought was "significantly misrepresented" based on your description of the ad.

Not knowing the specific seller, keep in mind that a lot of businesses on ebay and on amazon exist on the business of small price/large volume sales. That lens might have been messed up by someone else, they said f* it and then donated it or something to that effect, and it showed up on ebay from this seller who is either trying to make a living on large volume sales or is a charity trying to make a little bit for their cause. Anyone ever buy a used book for pennies on amazon and the shipping is $6? Same principle - the large volume of sales gives the seller a better shipping rate but charges you the standard rate, so even if the book is sold for $.01 they still make a profit off the shipping and that money goes towards someones wallet or feeding some kid in symbolia...

Anyways the point is, I wouldn't automatically conclude the seller was trying to pull a fast one. I've bought products from the type of seller i've just described before and they were not products as described i.e. proper working condition. The problem is a seller like that doesn't have the resources or knowledge to check everything that comes in and out of it's doors other than a quick glance over and some rudimentary test just to make sure "it works". That's the business of large volume sales. Just contact them and they should be more than happy to accept a return (of course, you did make sure they have a return policy and looked over their feedback ratings before you hit 'bid now' didnt you? :cool:)

My thoughts? if I were you I would consider the time it would take to return it, and how much you value your time. If it were me and I spent $15 on a lens that turned out to be not what I expected; I would consider it a sunk cost and forget about it. Think about that, are you really going to waste a couple of hours of your time over $15 because of some moral high ground that may or may not be justified?

Return it, leave a negative remark, don't return it, dont leave a negative remark, go out to lunch instead, whatever. Do research on the seller before making any accusatory assumptions in a feedback rating.
Forum: Digital Processing, Software, and Printing 05-06-2011, 10:33 AM  
Not sure what to place blame on...
Posted By Capslock118
Replies: 12
Views: 2,485
Not that I am a professional and have a dire priority, but i'll second that Transcend is a good SD maker.

8gb (6) speed SDHC on amazon was $11 without fail yet.
Forum: Pentax K-5 05-06-2011, 10:24 AM  
K5 for $1199...do you think this site is legit? I'm thinking of buying it.
Posted By Capslock118
Replies: 40
Views: 9,151
ah, so it's a dropship company then?

costs slightly less money but takes twice as long to get your parts because they don't stock anything.
Forum: Film Processing, Scanning, and Darkroom 05-05-2011, 08:40 PM  
Image size translating to BPs and DPI
Posted By Capslock118
Replies: 1
Views: 2,720
so:

K100D is 6MP.

take a photo

reported pixel size is 3008x2008 = 6MP * 3 (RGB) = 18 megabytes



Memory cost of images

Why are my photos in aperture reporting 11MB? sometimes 9mb?

When scanning actual pictures I get the size I would expect.
Forum: Photographic Technique 05-03-2011, 10:55 AM  
How to improve starry night picture?
Posted By Capslock118
Replies: 13
Views: 4,179
So your sig says you are from western NY.

I grew up in buffalo (hamburg) with a cottage in chautauqua.

There is a lot of light polution out there - the picture in the article you linked to was taken in utah - at a national park - where not much light exists.

You will not get the same results sorry to say. The light polution in your area will weed out all of the faintest stars, leaving only the brightest.

A longer exposure time will help for sure, but you won't get every detail like in that article.

Like he says:





QuoteQuote:

The Milky Way is out there every night. But you need a really, truly dark sky like what they have at Natural Bridges National Monument in southern Utah



Forum: Troubleshooting and Beginner Help 05-03-2011, 08:10 AM  
DOF Scales on DA lenses
Posted By Capslock118
Replies: 6
Views: 2,176
camera is a k100d and from what i've read, i don't really want to push larger than 8x10 on a 6mp camera anyways.

I've just been using my manual primes recently to get to know them better and have a better eye for focusing manually.

finding out how the DOF scales work has been a real treat during play time.
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