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Posts for: chrisg-optical
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Apr 23, 2024 06:51:36   #
I find that BBF with focus tracking (for moving subjects) works well on the Z6ii and Z7ii. For focus tracking I use the assigned FN1 button up front to activate.
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Apr 21, 2024 19:44:11   #
CHG_CANON wrote:
The only people shooting film in 2024 are fossils, the idle rich and hipsters from Brooklyn.


hmmmm...I'm from Brooklyn, but not sure if I am a hipster...I probably have some film DNA in me.... :))))
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Apr 21, 2024 16:03:56   #
I would say the only advantage to analog photography is if you can keep the whole process analog. That is, no digital scanning to make prints, just like in the old days. Once you scan the images, what's the point? Of course, to show your work online, you have to have digital images. Are there any labs which make prints via optical enlargement and printing? I do have three OM film cameras and three rolls of color film to use this summer, just as a lark. We'll see....
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Apr 20, 2024 18:19:31   #
CHG_CANON wrote:
Wabbit, we've got a jumper!!


Or, if this were Logan's Run, "We've got a runner in sector G..."
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Apr 19, 2024 01:27:34   #
GVC48507 wrote:
I am thinking of replacing my Tamron 150-600 Di VC lens. I have a Nikon D7000 and a new Z7ii. I have been very happy with the Tamron it works well on the D7000, BUT it does not auto focus on the Z7ii. As best as I can find it is the firmware/software on the lens and cannot be updated. I love the Z7ii and the focusing capabilities. I am thinking of the Nikon's F mount 200-500 f/5.6 E ED (used it can be had for 900 range at MBP) or the Z mount 180-600 f/5.6-6.3 VR (new 1,700 no used listed that I have found). I have the F to Z adapter. I have been happy with my past used purchases from the usual suspects (KEH, B&H). I have a few F mount lens those that autofocus work with the F2Z adapter and work on the Z7ii. I have two Z mount lenses 24-120 and the 105, both are S lenses and have to me outstanding image quality. I would be using this lens for birds and other nature photos. If you have either or both which do you think has the best image quality and would be my best option?
I am thinking of replacing my Tamron 150-600 Di VC... (show quote)


Probably the best choice is the Z 180-600 if money is not an issue, otherwise a used Tamron 150-600 **G2** lens will work on the Z7ii (I have both via the FTZii). HOWEVER, you should also get the Tap-In console to make sure the firmware is updated in the lens - also make sure the Z7ii has the latest firmware too. The F 200-500 lens is excellent too.
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Apr 19, 2024 01:20:37   #
Sidwalkastronomy wrote:
Your still out the return postage.
For camera purchase I would stick with a reputable camera store like b and h


That represents the maximum risk to the buyer, especially for overseas items (I do like lenses from Japan usually). However, on the flip side, returns are uncommon if you deal with buyers who have a good rep, plus you can't get many items at B&H or retail used merchants like KEH. eBay offers more choices for the buyer. I've had good success with used lenses from KEH, although I had to return one lens because it was described as AF-S (Nikkor) when it was an older AF lens (incorrect inventory labelling).
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Apr 17, 2024 22:48:43   #
TRAVLR38 wrote:
I am interested in purchasing a used camera using E-Bay. I have never used the site before, and have several questions.
1. How do you know the item is actually as described?
2. If necessary, is there a way to send the item back and get a refund?
3. Are there any possible problems in dealing with E-Bay?
4. If so, how avoid them?
If any of you who have dealt with E-Bay have any advice, I would be pleased to hear it.
Thanks in advance.


1. How do you know the item is actually as described? Only consider items that have clear pics of the item from every possible angle. If it's a lens you want a shot looking down the barrel with the lens caps off and held up to bright light. The description should agree with the photos. Be aware of stock photos - you want photos of the actual item and you can verify that with a pic of the serial number - make sure that the item you receive has the same serial number and the condition appears the same as in the pics and descriptions.

2. If necessary, is there a way to send the item back and get a refund? That depends on the seller - only deal with sellers who have a high rating 98%++ with 100 or more ratings, AND, they offer a return period (14 or 30 days is typical). The buyer pays return shipping which is customary. I avoid sellers who don't have a return policy. However keep in mind if there are inaccuracies in the description (e.g., item is described as "mint" and when you receive it is all scratched up and dented), ebay can enforce a return/refund regardless of their return policy.


3. Are there any possible problems in dealing with E-Bay? Usually more for the seller than the buyer. Sometimes you will be contacted by scammers who claim to be the seller or buyer (whichever is applicable). Make sure your delivery address is correct and current. Sellers are only protected if they send the item to the registered address of the buyer. Some scammers pretend to be the buyer, offering to ship the item to an alternate address since they recently moved which is BS. If you follow the above advice, for the buyer there is very little to worry about.

4. If so, how avoid them? Only deal with sellers offering a return policy, have detailed descriptions and clear pics from many angles, and have higher ratings of 98% or more with 100 sales or more. Don't deal with scammers who try to DM you - only communicate through the ebay back office.
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Apr 13, 2024 13:43:54   #
andesbill wrote:
I did everything right (except 2 phones). If they want to, they’ll get you.


Yeah but hackers are lazy too and they rely more on the low hanging fruits first (don't be the low hanging fruit!) - it's very easy for them to intercept wifi data streams with a laptop and a network card on the USB port. Most people don't have secure connections and even though session data is encrypted at one level, it is used to directly access accounts which is the real problem - it's convenient not having to re-login every time but it's also like leaving the keys to your house on a Starbucks table with a note "come rob me at 123 Main St".

They also use social engineering and security weaknesses at the mobile companies for SIM swapping hacks - that is the other technique that is popular these days. They call the mobile company pretending to be you and enable a new SIM card on their device using YOUR number.

Rarely will they use the "brute force" code cracking as you see in the movie Swordfish (good one if you haven't). Most hackers don't have the computing resources to crack a 23+ character password, or even break into a bank's network. Even the NSA doesn't have those resources, but they use other means which are even easier if they want to but they usually exploit something that is "low hanging". You should still use super long passwords, 2FA/MFA, multiple back up emails, but just don't make the mistake of leaving your keys on the table, so to speak.

Some PayPal tips to prevent financial disaster - only link bank accounts that have low balances with NO OVERDRAFT to the PayPal account. Have two bank accounts (or more, at several banks) - one where you store the funds, and the other linked to PayPal. You never share the primary account with anyone, and don't write any checks against it, or have any debit cards. You use the secondary account to transfer funds to as needed, or transfer into the main account for a store of funds, or use a debit card with. For credit cards, don't link high balance credit cards to PP. These tips will also prevent PP from getting stupid with any "fines" or "penalties" as was talked about in the news last year. Even if a hacker cracks into your PP, they will have access to only limited funds.
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Apr 13, 2024 13:10:22   #
andesbill wrote:
My PayPal account was hacked a few days ago. They changed my password, got into my phone and hijacked my eSIM, so I couldn’t phone in or react to two factor authentication. My face let me get in, so Face ID is useless. My password was the huge strong one suggested by Apple- also useless, as of course was two factor authentication.

The thief created a debit and a credit card on PayPal. Using the debit card he/she transferred $1000 from my bank to PayPal. We caught this before any damage was done. Online, I notified PayPal that I was hacked, to stop transferring money from my bank, and to close down the card so that the thief couldn’t withdraw any money from the new PayPal account.
I was ignored. PayPal allowed the thief to try and withdraw $4000 from my bank, it didn’t happen, because we had already notified our bank about the hack.
The next day PayPal allowed the thief to use the unauthorized debit card to pay for a t-mobile bill (we use Verizon), and another purchase. PayPal also allowed the thief to use the unauthorized credit card to make a purchase at Walgreen’s in the Bronx (I live in Florida).
I of course disputed the purchases, but I was denied because they said that it was in line with my other uses of PayPal, it wasn’t.
I had to reach a supervisor for debit card at PayPal to get someone to listen to me. They are now taking me seriously (at least for the debit card- the credit bill is another hassle altogether).
So now they are checking my story with t-mobile and the other place.
PayPal cannot be trusted. This whole mess, including dealing with them, my password, Verizon, my bank, and the 3 credit exchanges has eaten up maybe 6 hours so far, with no end in sight.
I can’t close PayPal down until this is finished. Be very careful if you use PayPal.
My PayPal account was hacked a few days ago. They... (show quote)


Yes PayPal is not foolproof, so hacks like this can occur, but they are usually done with weaknesses outside of PayPal - for example, using public WiFi (or other unsecured WiFi) is very dangerous especially without a VPN. In these cases, they intercept the session cookies (aka "persistent cookies" or cached session data) which allows them to gain access to your account on another device without even knowing a password or user id (with this hack 2FA, MFA and strong passwords are irrelevant). Once they gain access they can spend, transfer money, change passwords, add their own emails, etc. One way to avoid this hack is to avoid public or insecure WiFi like the plague. Many of these hacks happen at Starbucks, cafes, public libraries and airports. I am usually against VPNs on the PC at home, but on mobile devices they are more critical if you use public networks on mobile devices/laptops. Better to use your own portable WiFi device, with a VPN, and secure WiFi passwords. Also, never select "stay logged in" on mobile devices - that places a persistent cookie on your app that can last up to 30 days! Always completely log off when done using the app. These hacks happen with bank accounts too all the time.

What some folks do is have TWO mobile devices - one to connect to the net, and the other, usually a SIM-less smartphone, that connects via your own WiFi. This is a more secure setup, especially with a VPN which is recommended in these mobile cases. For voice calls they can use Skype or other similar messenger service (may cost a few bucks $$$).
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Apr 13, 2024 11:12:34   #
NaomiB wrote:
Hi All
My cousin is recuperating from a hiking fall and has to be immobile for 6 weeks. Her next safer hobby will be photography. Can you suggest a photography book to learn from and inspire her in her new adventure?

Regards
Naomi


I would suggest macro photography, if she is house bound, and especially if she has a backyard, and maybe bird photography if that is the case. There are oodles of tutorial videos on YT and forums here on UHH.
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Apr 12, 2024 21:03:28   #
stu352 wrote:
I'm ready to part with some old photo gear. What's the preferred safe and fair payment method when you have to ship your items, as opposed to meeting in person? I don't have PayPal, Venmo, or any of those.


Depends how you're selling the equipment - in person, ebay, UHH, etc. If you have a bank account, you can open up a free PayPal account, but of course they take a percentage of the amount sent to you, so factor that into the pricing. Most buyers are more comfortable with PayPal, if you are dealing with them remotely. Even if you meet in person with a cash sale, you have to be careful they don't run away with the equipment without paying - I've heard those horror stories. If you sell on ebay, ebay holds the funds until you ship the item and it is received via the tracking number. There may be additional hold time for other reasons. But once the hold period is over, the money is direct deposited to your bank account - ebay takes a hefty 12-15% of the sale. If you are selling directly via Craigslist or UHH PayPal is usually preferred. You can accept money orders if you want, but I would avoid personal checks at all costs, otherwise you will have to wait for it to clear which could take up to a few days.Verify with your bank that the check did clear.
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Apr 11, 2024 14:05:06   #
Robertl594 wrote:
I shot the eclipse. Would have preferred to use my 400 f/2.8 but I did not have a large enough filter to cover the front element. I used my 100-400 because I had a 77mm solar filter.

My question is, my 400mm uses a 46mm drop in filter just in front of the camera, not in front of the front element, will the sun damage the elements and coatings in front of the filter? I did not want to take the chance of damaging my lens, so I did not use it. I have ordered some sheet filters large enough to cover the front element in the future.

Thank you for answers.

Here are a few I was able to get.
I shot the eclipse. Would have preferred to use my... (show quote)


I doubt it is an issue for the short amount of time the event happens. Sensor/shutter damage is more likely than coating damage. Some eclipse photogs will place cardboard over the lens when not exposing, or use the lens cap.
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Apr 10, 2024 21:40:58   #
Nice shots,especially the diamond ring "money shot". Seeing those sun flares is awesome!
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Mar 31, 2024 14:51:15   #
PhotogHobbyist wrote:
I often see and read posts about the discrepancies of results between different camera makes with different lenses on each and the resultant differences of the images. Why wouldn't there be differences? If one wants to get the same results in photographs from two cameras, why not use the same make and model camera with a lens made specifically for that camera brand? My thoughts are that for consistency in IQ, color, and resolution Use the same brand of cameras with the same brand of lens on each. We all apparently agree that one camera is going to have a slightly different color and quality than another make or even model. That's why we each have our preferred brand and model of camera. We also all have different preferences in post processing (if used) to adjust our final version of our photos. Just my thoughts and musings.
I often see and read posts about the discrepancies... (show quote)


I think too much is made about that. Even with identical cameras, lenses, exposure, settings, a pixel peeper will probably find some difference in the images, but not significant enough to worry about, and probably caused by differences in the calibrations of the two cameras. I always shoot RAW, so I can pretty much tweak anything related to exposure, WB, and effects - I just concern myself about "getting it in the ballpark". The JPG outputs of the various cameras will produce varying results depending on applied settings and the manufacturers' internal DSP handling to produce JPG outputs. ALL images are approximations of our reality, what we see with our eyes, and in many cases there are variations in color perception or color blindness - our eyes are the ultimate cameras and lenses (let's all too, not forget about variations in monitors and calibrated monitors). There are many considerations here besides the capturing equipment too.
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Mar 31, 2024 14:24:01   #
Longshadow wrote:
The second one is kinda heavy and true...


Me too, but realize no media that we know of can last tens of thousands of years, except that written in stone, and eventually those will erode away too - it's a question of when not if. Ask yourself, suppose I want people 10,000 or 100,000 years to see the images I have taken? Anything printed on paper, unless it's stored in a controlled environment, and it's kept controlled, will eventually disintegrate. Metals oxidize and degrade too, as with very old coins. Film, slides or negatives, will eventually rot and turn acidic. All current digital media has limited lifespans, whether it's flash, SSD, CDs, DVD, BD, M-DISC, hard drives (even in a RAID),tape (LTO tapes up to 30 years), etc. The other problem with any type of media, digital or analog, is the availability of a device to read it. Eventually electronics will fail too. At the very least, flash memory used in processors and local storage will degrade too. (Old home computers from the 1970s for example, need to have their EPROMs refreshed or replaced.) The best we can do is preserve digital media via generational copies on the most reliable media we have. This is the strategy used by many large media and entertainment companies with LTO tape - upgrading the drives and tapes every 2-3 generations, as well as diversifying on multiple types of media such a proprietary disc formats.

Until a super durable medium is invented (>200-1000 years), the generation copy system is all we have. Holographic storage media with ECC may be on the horizon someday, promising super dense and super reliable storage. Again, the device to read it must be as reliable and durable too.
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