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Forum: Pentax K-5 07-02-2012, 08:13 PM  
shutter fires twice in single shot mode???
Posted By shang
Replies: 7
Views: 1,746
thanks guys. very helpful! will send to repair... fortunately my credit card covers the camera for 1 more year:-)
Forum: Pentax K-5 07-01-2012, 01:23 PM  
shutter fires twice in single shot mode???
Posted By shang
Replies: 7
Views: 1,746
hi all!

just wondering if this is a problem that I can fix myself... or I have to send it for repair.

In single shot mode, the k-5 takes 2 pictures almost every time I press the shutter. So basically one press of the shutter button makes the shutter fire twice and take 2 pics.

To me that's a really annoying problem. So if you ever had the same experience and had a way to solve it, please share.

Thanks a lot in advance!
Forum: Pentax SLR Lens Discussion 02-13-2012, 12:24 PM  
Very pleased with the new DA prime lenses
Posted By shang
Replies: 23
Views: 2,697
will certainly get the new 50mm lens!!!
Forum: Pentax K-5 02-22-2011, 07:41 PM  
Removing acmaxx 3.0 hard lcd protector
Posted By shang
Replies: 9
Views: 4,211
i believe to buy a new one is the only best choice...
Forum: Pentax SLR Lens Discussion 02-06-2011, 12:04 AM  
The first Professional DA L 35mm f/2.4 review?
Posted By shang
Replies: 1
Views: 2,227
I don't know if somebody else has already shared this DA L 35mm f/2.4 review from erphotoreview... I believe it's the first one that published MTF figures, etc.

SMC Pentax DA 35mm f/2.4 AL ERPhotoReview
Forum: Pentax K-5 01-30-2011, 04:00 PM  
Shutter Life v.s. Half-Press AF Life?
Posted By shang
Replies: 16
Views: 6,252
hi, Guys,

As in the title, a quick question: the k-5's(or k-7, k20d, etc.) shutter life is designed to be more than 100k. So what about the Half-Press AF life?

My experience is that in some certain cases, when I take a picture, I half-press 3--5 times to auto-focus... So is there a longevity for the half-press? I am worrying that someday, the half-press refuses to work, or in less severe cases, it becomes very sensitive or very insensitive, which will of course impact the shutter.
Forum: Pentax DSLR Discussion 01-28-2011, 03:44 PM  
Decreasing EV to get faster shutter speed?
Posted By shang
Replies: 18
Views: 4,910
thanks guys! I believe K-5 keeps enough details even when EV is decreased. But still, doing this is at least not a better way than increase the ISO.

Another thing to consider, though, is that when the DR of the image I want to capture is huge, decreasing the EV in K-5 may help capture the details in all areas. But that's nothing related to shuuter speed...

thanks again!
Forum: Pentax SLR Lens Discussion 01-27-2011, 02:54 AM  
DA*16-50 Brought Back to Life
Posted By shang
Replies: 5
Views: 3,228
Hope I don't need to do this.... Anyway, Congratulations!!!!!!!!!!!!

One Question, does this method bring dust inside the DA*? thanks!
Forum: Pentax DSLR Discussion 01-27-2011, 01:45 AM  
Decreasing EV to get faster shutter speed?
Posted By shang
Replies: 18
Views: 4,910
Hi, Guys,

A quick question: when I have the lens wide open and highest usable ISO set, is it a good way to get faster shutter speed by decreasing the EV? Another way of saying it is that is it always possible to get the correct exposure back by PP?

thanks a lot for any input!
Forum: Pentax News and Rumors 01-16-2011, 08:41 PM  
K-5 Price Going Forward
Posted By shang
Replies: 47
Views: 12,579
i am sure a lot of people bought the k-5 with the epson printer rebate offer. The printer can be sold on ebay for around $300, which makes the price of the k-5 around $1150.
Forum: Pentax K-5 01-12-2011, 07:12 PM  
BF with 2 lenses DA 16-45 & DA 50-135
Posted By shang
Replies: 8
Views: 2,301
Aussie, you can adjust your lenses by doing some very simple tests(not scientific but they do work well). For DA* 50--135, you can simply turn off the Shake Reduction, then fix the camera and point it to a specific subjuct, such as a book. Then set the lens to f/2.8, take a group of 4 simple pictures using LIVE VIEW, at 50, 70, 90 and 135mm respectively. After that, the most simple way is to take 11 groups of pictures(each group has 4 pics at 50, 70, 90, 135) setting focus adjustment to 0, +1, +2, ..., +10. Then look at the pictures and find which group is the best compared to the LIVE VIEW group.
Forum: Pentax K-5 01-12-2011, 04:24 PM  
BF with 2 lenses DA 16-45 & DA 50-135
Posted By shang
Replies: 8
Views: 2,301
I think the problem is OK. Try adjust all + adjust one, which can give you +20 adjustment.

Focus adjustment on zoom lenses sometimes gives different results at both ends(i.e. maybe FF at one end and BF at the other end), if that's the case, then send the body together with the lenses to repair.
Forum: Pentax SLR Lens Discussion 01-10-2011, 08:47 PM  
DA* 50-135 f/2.8 or DA 70 f/2.4 + Tamron SP AF 90mm f/2.8?
Posted By shang
Replies: 9
Views: 2,861
For potraits, i'd suggest you get the 70+90 combo, considering the price and tamron's macro ability.

The zoom gives you flexibility and 135mm reach, which are not that important for potraits. Plus, it is heavy, and focuses relatively slow.
Forum: Sold Items 01-10-2011, 08:36 PM  
For Sale - Sold: pentax smc M 50mm f/2.0 (US)
Posted By shang
Replies: 3
Views: 2,438
Sold!
Forum: Sold Items 01-10-2011, 08:35 PM  
For Sale - Sold: K-7 body + 8GB Class 6 SDHC card (Worldwide)
Posted By shang
Replies: 5
Views: 3,079
Sold!
Forum: Sold Items 01-09-2011, 06:20 PM  
For Sale - Sold: K-7 body + 8GB Class 6 SDHC card (Worldwide)
Posted By shang
Replies: 5
Views: 3,079
price reduced to $690!
Forum: Pentax K-5 01-09-2011, 01:39 PM  
K5 AF adjustment
Posted By shang
Replies: 4
Views: 2,642
I think -8 and +10 are absolutely fine(if you are sure that +10 is good enough). The camera offers only very MICRO focus adjustment, which means even a +10 cannot suggest anything is wrong. Send the camera to warranty is fine now, but if you upgrade to other lenses in the future, it may be a problem again.
Forum: Sold Items 01-08-2011, 07:35 PM  
For Sale - Sold: pentax smc M 50mm f/2.0 (US)
Posted By shang
Replies: 3
Views: 2,438
bump!
Forum: Pentax K-5 01-08-2011, 04:02 PM  
Relevant news re malfunctioning AF under artificial light
Posted By shang
Replies: 752
Views: 106,749
FYI, my k-5's AF works fine under artificial light. I don't know if it relevant or not, my serial number is 3970***.
Forum: Sold Items 01-08-2011, 04:01 PM  
For Sale - Sold: K-7 body + 8GB Class 6 SDHC card (Worldwide)
Posted By shang
Replies: 5
Views: 3,079
price reduced!
Forum: Sold Items 01-06-2011, 09:54 PM  
For Sale - Sold: pentax smc M 50mm f/2.0 (US)
Posted By shang
Replies: 3
Views: 2,438
PentaxForums.com Marketplace Listing

Item for Sale
pentax smc M 50mm f/2.0

Asking Price
$27 shipped paypal gift

Item Location
Long Island, NY

Item Description
used M 50mm f/2.0. A wonderful lens, and a cheap lens. IMO it is a perfect prime lens to start with... The lens has some cosmetic scraches but optically it's very good. $27 shipped.

comes with front and rear lens caps.

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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Good

Shipping Destinations
United States

Shipping Charge
included

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
no returns...

Please send me a private message if interested in the item!
Forum: Sold Items 01-06-2011, 09:47 PM  
For Sale - Sold: K-7 body + 8GB Class 6 SDHC card (Worldwide)
Posted By shang
Replies: 5
Views: 3,079
PentaxForums.com Marketplace Listing

Item for Sale
K-7 body + 8GB Class 6 SDHC card

Asking Price
$690 shipped paypal gift(originally $725)

Item Location
Long Island, NY

Item Description
K-7 body for sale. Bought in August 2010 from Amazon.com, shutter count around 6k. the body is in excellent condition, the ACMAXX screen protector will come with the body. There is very tiny dust under LCD cover which does not impact use at all. Also I am selling the body with a Transcend 8GB SDHC Class6 card. total is $725 shipped to the lower 48 states. International shipping costs more.

I bought the K-7 with 3-year extended warranty, so it still has at least 2.5 years of warranty left. I will provide the original receipts for warranty purpose.

You will receive all the things coming with the k-7, including but not limited to the original box, battery and charger, strap, manual, software, eyecup, wires, etc...

btw, I have 100% feedback on ebay as y1985s:)

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

Are you selling or trading this item?
Selling

Item Condition (Key)
Used
Mint

Shipping Destinations
Worldwide

Shipping Charge
included

Shipping Services
USPS

Accepted Payment Types
PayPal

Return Policy & Additional Details
no returns, sorry...

Please send me a private message if interested in the item!
Forum: Pentax K-5 01-06-2011, 08:21 PM  
Does the K5 Amplify Purple Fringing?
Posted By shang
Replies: 27
Views: 9,052
James, the picture was shot with da* 16--50.

I just noticed that I shot the same scene with the k-7 and da* 16--50 in November, almost under the same level of sunlight, at a different angle though. Surprisingly, what I just found is that the k-7 also produced considerable amount of PF, actually on par with the K-5...

So I don't know if the k-5 amplify PF... at least from my samples.
Forum: Pentax K-5 01-06-2011, 01:05 PM  
Does the K5 Amplify Purple Fringing?
Posted By shang
Replies: 27
Views: 9,052
look at the PF everywhere!
Forum: Pentax K-5 01-05-2011, 09:11 PM  
K5 and DA*50-135mm
Posted By shang
Replies: 10
Views: 3,522
mine combination of k-5 and da* 535 is "fine". Tackle sharp from 70--120, very tiny back focus at 50 and 135... that's the problem with zoom lenses, you can never find a good constant adjustment throughout the zoom range...
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